Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Online Education for Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Online Education for Human-Environment Interactions: The Tropical and the Subtropical Region Class 7 Extra Questions Geography Chapter 8

Class 7 Geography Chapter 8 Extra Questions Question 1.
Where does the equatorial region lie?
Answer:
The region which lies between 10°N and 10°S is referred to as the equatorial region.

Class 7 Geography Chapter 8 Worksheet Question 2.
What is river’s mouth?
Answer:
The place where a river flows into another body of water is called the river’s mouth.

Class 7 Geography Chapter 8 Extra Questions And Answers Question 3.
Which parts are drained by the Amazon river basin?
Answer:

  • Portions of Brazil,
  • Parts of Peru,
  • Bolivia,
  • Ecuador,
  • Columbia and
  • Small part of Venezuela.

Human Environment Interactions The Tropical And The Subtropical Regions Extra Question 4.
Which is the largest river basin of the world?
Answer:
Amazon basin.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Ncert Class 7 Geography Chapter 8 Extra Questions Question 5.
What are tributaries?
Answer:
The small riverS that join the main river are called tributaries.

Chapter 8 Geography Class 7 Extra Questions Question 6.
What is catchment area or river basin?
Answer:
The main river along with all its tributaries that drain an area form a river basin or the catchment area.

Class 7 Geography Ch 8 Extra Questions Question 7.
Which type of vegetation is found in equatorial region? Why?
Answer:
Thick forests grow in the equatorial region because it rains heavily in this region.

Extra Questions For Class 7 Geography Chapter 8 Question 8.
Name two plant parasites found in equatorial region.
Answer:
Orchids and bromeliads.

Geography Class 7 Chapter 8 Extra Questions Question 9.
What are bromeliads?
Answer:
Bromeliads are special plants that store water in their leaves.

Class 7 Chapter 8 Geography Extra Questions Question 10.
What work do men and women perform in the rainforests?
Answer:
Men hunt and fish along the rivers, while women take care of the crops.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Class 7th Geography Chapter 8 Extra Questions Question 11.
Which crops are grown by the people of rainforests?
Answer:

  • Tapioca,
  • pineapple and
  • sweet potato.

Ch 8 Geography Class 7 Extra Questions Question 12.
Which type of agriculture is practised by the people of rainforests?
Answer:
Slash and burn agriculture.

Geography Chapter 8 Class 7 Extra Questions Question 13.
What is the food of the people residing in rainforests?
Answer:
Manioc (cassava) is the staple food.

Class 7 Geography Chapter 8 Question Answer Question 14.
Which cash crops are grown in the equatorial region?
Answer:

  • Coffee,
  • maize and
  • cocoa.

Human Environment Interaction Class 7 Questions And Answers Question 15.
What is ‘Maloca’ in the Amazon basin?
Answer:
Large apartment-like houses with steeply slanting roofs are called Maloca in the Amazon basin.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Question 16.
Write the climatic conditions of the Amazon basin.
Answer:

  • Amazon basin is characterised by hot and wet climate throughout the year.
  • Both days and nights are almost equally hot and humid.
  • It rains almost every day.

Question 17.
How have the rainforests of the Amazon basin been made accessible?
Answer:

  • The Tranz-Amazon highway have made all parts of the rainforests accessible.
  • Aircraft and helicopters are also used to reach various places of the rainforests.

Question 18.
How have developmental activities adversely affected the rainforests?
Answer:

  • Development activities have led to gradual destruction of the biologically diverse rainforests.
  • A large area of rainforests have disappeared in the Amazon basin.
  • The topsoil washes away as the rain falls and the lush forest converts into a barren landscape.

Question 19.
What is slash and burn agriculture?
Answer:
Slash and burn is a way of cultivating land where farmers clear a piece of land by slashing or cutting down trees and bushes. After two or three crops, the soil loses fertility. So farmers abandon that patch and clear another plot of land to cultivate.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Question 20.
Amazon basin is rich in the variety of wildlife. Explain.
Answer:

  • Birds such as toucans, hummingbirds, birds of Paradise are found here, which make loud sounds in the forests.
  • Animals like monkeys, sloths and anteating tapirs are found here.
  • Various species of reptiles and snakes also thrive in these jungles.
  • Various species of reptiles and snakes also thrive in these jungles. Anaconda and Boa constrictor are some of the species.
  • Basin is also home to thousands of species of insects.
  • Several species of fishes including the flesh-eating Piranha fish is also found in the river.

Question 21.
Between which latitudes does the Ganga-Brahmaputra basin lie?
Answer:
The Ganga-Brahmaputra basin lies in the sub-tropical region that is situated between 10°N to 30°N latitudes.

Question 22.
Name the tributaries of the river Ganga.
Answer:

  • The Ghaghra,
  • the Son,
  • the Chambal,
  • the Gandak and
  • the Kosi.

Question 23.
What are main features of the Ganga-Brahmaputra basin?
Answer:

  • The plains of the Ganga and the Brahmaputra.
  • The mountains and the foothills of the Himalayas;
  • The Sunderban delta.

Question 24.
Write the climatic conditions of the Ganga-Brahmaputra basin.
Answer:

  • The Ganga-Brahmputra basin is dominated by monsoon climate.
  • The monsoon brings rains from mid-June to mid-September.
  • The summers are hot and the winters cool.

Question 25.
What is population density? Give one example.
Answer:
Population density means the number of persons that live in one square kilometre of area, e.g., the population density of Uttaranchal is 159.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Question 26.
Name the food crops which are grown in the Ganga-Brahmaputra basin.
Answer:
Rice, wheat, maize, sorghum, gram and millets.

Question 27.
Name the cash crops grown in Ganga-Brahmaputra basin.
Answer:
Sugarcane and jute.

Question 28.
Where is tea grown in the Ganga-Brahmaputra basin?
Answer:
West Bengal arid Assam.

Question 29.
Which type of cultivation is practised in the hilly region?
Answer:
Terrace cultivation.

Question 30.
Where is silk produced in the Ganga- Brahmaputra basin?
Answer:
Bihar and Assam.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Question 31.
Which regions are covered with mangrove and coniferous trees of Ganga- Brahmaputra basin?
Answer:

  • The delta area is covered with the mangrove forests.
  • Parts of Uttaranchal, Sikkim and Arunachal Pradesh are covered with coniferous trees.

Question 32.
Name the cities with population of more than ten lakhs located along the river Ganga.
Answer:
Allahabad, Kanpur, Varanasi, Lucknow, Patna and Kolkata.

Question 33.
Explain how topography plays a dominant role in the distribution of population.
Answer:

  • The mountain areas with steep slopes have inhospitable terrain. Therefore, less number of people live in mountain areas.
  • The plain areas provide the most suitable land for human habitation. The soil is fertile. Agriculture is the main occupation of the people. Therefore, the density of population of the plains is very high.

Question 34.
Name some places of the Ganga- Brahmaputra basin which are worth visiting.
Or
Why has tourism flourished in the Ganga-Brahmaputra basin?
Answer:
The places which are worth visiting in the Ganga-Brahmaputra basin –

  • Taj Mahal on the banks of River Yamuna in Agra.
  • Allahabad on the confluence of the River Ganga and Yamuna.
  • Buddhist stupas in Uttar Pradesh and Bihar.
  • Imambara in Lucknow.
  • Kaziranga and Manas wildlife sanctuaries in Assam.

Question 35.
Describe the variety of wildlife found in the Ganga-Brahmaputra basin.
Answer:

  • Elephants, tigers, deer and monkeys are common.
  • The one-horned rhinoceros is found in the Brahmaputra plains.
  • In the delta area, Bengal tigers, crocodiles and alligators are found.
  • Aquatic life abounds in the fresh river waters, the lakes and the Bay of Bengal. The popular varieties of the fish are the Rohu, Catla and Hilsa.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

Multiple Choice Questions (MCQs)

1. Which one of the following terms is used for the Tropical region lying between 10°N and 10°S latitudes?
(a) Temperate region
(b) Equatorial region
(c) Polar region
(d) Sub-Tropical region.
Answer:
(b) Equatorial region.

2. Which one of the following is not a part of the Amazon basin?
(a) Brazil
(b) Ecuador
(c) Columbia
(d) Argentina.
Answer:
(d) Argentina.

3. What kind of climate is found in the Amazon basin?
(a) Cloudy
(b) Hot and wet
(c) Rainy
(d) Cold.
Answer:
(b) Hot and wet.

4. Which one of the following types of forests is found in the Amazon basin?
(a) Tropical Rainforest
(b) Temperate Grasslands
(c) Tropical Deciduous forests
(d) Temperate Deciduous forests.
Answer:
(a) Tropical Rainforest.

5. Which one of the following is different from the other three, with reference to the crops growing in Amazon basin?
(a) Tapioca
(b) Wheat
(c) Pineapple
(d) Sweet potato.
Answer:
(b) Wheat.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

6. Which one of the following is the staple food of Amazon basin?
(a) Manioc (Cassava)
(b) Sugarcane
(c) Coffee
(d) Tea.
Answer:
(a) Manioc (Cassava).

7. What type of agriculture is practised in the Amazon basin?
(a) Intensive agriculture
(b) Subsistence agriculture
(c) Slash and burn agriculture
(d) Plantation agriculture.
Answer:
(c) Slash and burn agriculture.

8. Which one of the following terms is used for the apartment like houses of Amazon basin?
(a) Flat
(b) Circular houses
(c) Composite houses
(d) Maloca.
Answer:
(d) Maloca.

9. By which one of the following mode of transportation the Amazon basin becomes accessible?
(a) Trans-Amazon Highway
(b) Trans-Siberian railway
(c) Leh-Manali Highway
(d) Trans-Canadian Highway.
Answer:
(a) Trans-Amazon Highway.

10. Which one of the following rivers forms the Ganga-Brahmaputra basin?
(a) Yamuna river
(b) Ganga-Brahmaputra rivers
(c) Krishna-Kaveri rivers
(d) Narmada and Tapi rivers.
Answer:
(b) Ganga-Brahmaputra rivers.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

11. What is the latitudinal extent of the Ganga-Brahmaputra basin?
(a) 5°N to 10°N latitudes
(b) 10°N to 20°N latitudes
(c) 10°N to 30°N latitudes
(d) 10°S to 30°N latitudes.
Answer:
(c) 10°N to 30°N latitudes.

12. Which one of the following is the main features of Ganga-Brahmaputra basin?
(a) Malwa plateau
(b) Thar desert
(c) Peninsular plateau
(d) Sunderban delta.
Answer:
(d) Sunderban delta.

13. What type of climate is found in the Ganga-Brahmaputra basin?
(a) Monsoon type of climate
(b) Sub-Tropical type of climate
(c) Savanna type of climate
(d) Sudan type of climate.
Answer:
(a) Monsoon type of climate.

14. Which one of the following wild animals is found in the Brahmaputra plains?
(а) Wild Ass
(b) One horned rhinoceros
(c) Crocodiles
(d) Anaconda.
Answer:
(b) One horned rhinoceros.

15. Which one of the following is the staple food of the people of Ganga- Brahmaputra basin?
(a) Rice and Beans
(b) Wheat and Rice
(c) Rice and Fish
(d) Coffee and Tea.
Answer:
(c) Rice and Fish.

Class 7 Geography Chapter 8 Extra Questions and Answers Human-Environment Interactions: The Tropical and the Subtropical Region

16. Which one of the following is an important port on the river Hooghly?
(a) Mumbai port
(b) Kandla port
(c) Kolkata port
(d) Marmagoa port
Answer:
(c) Kolkata port.

17. On which one of the following rivers is the Taj Mahal situated?
(a) River Ganga
(b) River Yamuna,
(c) River Narmada
(d) River Tapi.
Answer:
(b) River Yamuna.

18. Kaziranga and Manas Wildlife Sanctuaries are located in;
(a) Assam
(b) Bihar
(c) Allahabad
(d) Uttar Pradesh
Answer:
(a) Assam.

19. Which one of the following cities is located on the confluence of the rivers Ganga and Yamuna?
(a) Patna
(b) Lucknow
(c) Agra
(d) Allahabad.
Answer:
(d) Allahabad.

20. Which one of the following regions is the Bengal tiger found?
(a) Mountains
(b) Delta areas
(c) Deserts
(d) Amazon basin
Answer:
(c) Deserts.

Extra Questions for Class 7 Social Science

Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

Online Education for Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

Here we are providing Online Education for Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10 was designed by subject expert teachers. https://ncertmcq.com/extra-questions-for-class-7-science/

Online Education for Class 7 Science Chapter 10 Extra Questions and Answers Respiration in Organisms

Respiration In Organisms Class 7 Extra Questions With Answers Question 1.
Where does cellular respiration take place?
Answer:
It takes place in the cells of organisms.

Class 7 Science Chapter 10 Extra Question Answer Question 2.
Write the equation for breakdown of food in aerobic respiration. With the use of oxygen
Answer:
Respiration In Organisms Class 7 Extra Questions With Answers

Respiration In Organisms Class 7 Questions And Answers Question 3.
Write the equation for breakdown of food in anaerobic respiration. Without the use of oxygen
Answer:
Class 7 Science Chapter 10 Extra Question Answer

Ncert Class 7 Science Chapter 10 Extra Questions Question 4.
What is a breath?
Answer:
A breath means one inhalation plus one exhalation.

Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

Class 7 Respiration In Organisms Extra Questions Question 5.
What is the breathing rate of an average person at rest?
Answer:
On an average, an adult human being at rest breathes in and out 15-18 times in a minute.

Class 7 Science Chapter 10 Extra Questions Question 6.
How do ribs and diaphragm move during inhalation?
Answer:
During inhalation, ribs move up and outwards and diaphragm moves- downwards.

Class 7 Science Ch 10 Extra Questions Question 7.
What care should be taken during sneezing?
Answer:
When one sneezes, he/she should cover his/her nose so that the foreign particles expelled out are not inhaled by other persons.

Extra Questions On Respiration In Organisms Class 7 Question 8.
Which is the respiratory organ for earthworm?
Answer:
Skin.

Ncert Solutions For Class 7 Science Chapter 10 Extra Questions Question 9.
What is exhalation?
Answer:
Giving out of air rich in carbon dioxide is called exhalation.

Respiration In Organisms Extra Questions Question 10.
What are anaerobes? Give example.
Answer:
There are some organisms such as yeast that can survive in the absence of air. They are called anaerobes.

Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

Respiration In Organisms Class 7 Extra Questions Question 11.
What is yeast? What is their use?
Answer:
Yeasts are single-celled organisms. They respire anaerobically and during this process yield alcohol. They are, therefore, used to make wine and beer.

Respiration Class 7 Extra Questions Question 12.
Why do you get muscle cramps after heavy exercise?
Answer:
The cramps occur when muscle cells respire anaerobically. The partial breakdown of glucose produces lactic acid. The accumulation of lactic acid causes muscle cramps.

Respiration In Organisms Class 7 Extra Questions And Answers Question 13.
Show the composition of inhaled and exhaled air.
Answer:
The percentage of oxygen and carbon dioxide inhaled and exhaled air :
Respiration In Organisms Class 7 Questions And Answers

Class 7 Chapter 10 Science Extra Questions Question 14.
How does anaerobic respiration occur in humans?
Answer:
During heavy exercise, fast running, cycling, walking for many hours or heavy weight lifting, the demand for energy is high. But the supply of oxygen to produce energy is limited. Then anaerobic respiration takes place in the muscle cells to fulfil the demand of energy :
Ncert Class 7 Science Chapter 10 Extra Questions

Chapter 10 Science Class 7 Extra Questions Question 15.
Describe respiration in earthworm.
Answer:
Earthworms breathe through their skins. The skin of an earthworm feels moist and slimy on touching. Gases can easily pass through them.

Question 16.
Give a brief description of our respiratory system with diagram.
Answer:
Normally we take in air through our nostrils. When we inhale air, it passes through our nostrils into the nasal cavity. From the nasal cavity, the air reaches our lungs through the windpipe. Lungs are present in the chest cavity.
Class 7 Respiration In Organisms Extra Questions
This cavity is surrounded by ribs on the sides. A large muscular sheet called diaphragm forms the floor of the chest cavity.

Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

Question 17.
Draw diagrams to show movements of rib and diaphragm during breathing.
Answer:
Class 7 Science Chapter 10 Extra Questions

Question 18.
Describe respiration in cockroach.
Answer:
A cockroach has small openings on the sides of its body. These openings are called spiracles. Internally, they have a network of air tubes called tracheae for gas exchange. Oxygen-rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue, and reaches every cell of the body. Similarly, carbon dioxide from the cells goes into the tracheal tubes and moves out through spiracles.

Question 19.
How does breathing take place?
Answer:
Breathing involves the movement of the diaphragm and the rib cage. During inhalation, ribs move up and outwards and diaphragm moves down. This movement increases space in our chest cavity and air rushes into the lungs. The lungs get filled with air. During exhalation, ribs move down and inwards, while diaphragm moves up to its former position. This reduces the size of the chest cavity and air is pushed out of the lungs.

Question 20.
List the similarities and differences between aerobic and anaerobic respiration.
Answer:
Similarities :

  • Energy is released.
  • Carbon dioxide is produced.

Differences :

  • Anaerobic respiration does not require oxygen while aerobic respiration takes place in the presence of oxygen.
  • Glucose is completely broken down into CO2 and water in aerobic respiration but not in anaerobic respiration.

Question 21.
Why do we often sneeze when we inhale a lot of dust-laden air?
Answer:
When we inhale a lot of dust-laden air often these particles get trapped, in the hair present in the nasal cavity. Then they irritate the lining of the cavity, as a result of which we sneeze. Sneezing expels these foreign particles from the inhaled air and a dust-free, clean air enters our body.

Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

Question 22.
Boojho has seen in television programmes that whales and dolphins often come up to the water surface. They even release a fountain of water sometimes while moving upwards. Why do they do so?
Answer:
Whales and dolphins are mammals and they have lungs to breathe. For breathing, they have to come on the surface. During moving upward, they abruptly exhale air, which results into a fountain of water.

Experiment:

Aim: To show that exhaled air is rich in carbon dioxide.
Requirements: Freshly prepared lime water, bent glass pipe and test tube.
Procedure: 2 ml of freshly prepared lime water (clear solution) is taken in a test tube. Lime water is the common name for calcium hydroxide [Ca(OH)2]. Now, with the help of a bent pipe the exhaled air from mouth is blown.

Observation: Lime water turns milky.

Conclusion: The above observation confirms that exhaled air is rich in carbon dioxide.
Class 7 Science Ch 10 Extra Questions

Multiple Choice Questions

1. Breathing comprises of :
(i) inhaling O2 rich air and exhaling CO2 rich air.
(ii) inhaling CO2 rich air and exhaling O2 rich air.
(iii) only inhaling O2 rich air
(iv) only exhaling CO2 rich air.
Answer:
(i) inhaling O2 rich air and exhaling CO2 rich air.

2. When we release our breath after holding it for some time, we breathe heavily. Why is it so?
(i) The above statement is wrong.
(ii) It is just out of habit.
(iii) To compensate body requirements.
(iv) We breathe heavily for fun.
Answer:
(iii) To compensate body requirements.

Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

3. Which of the following is correct in context to breathing rate?
(i) It is constant.
(ii) It changes according to the requirement of oxygen by the body.
(iii) It changes periodically.
(iv) It is constant in some organisms and changes periodically in others.
Answer:
(ii) It changes according to the requirement of oxygen by the body.

4. For which of the following task, your breathing rate is highest?
(i) After a brisk walk for 10 minutes.
(ii) After running fast 100 m.
(iii) At normal.
(iv) At rest.
Answer:
(ii) After running fast 100 m.

5. Drowsiness is due to :
(i) receiving sufficient oxygen by body.
(ii) receiving insufficient oxygen by body.
(iii) receiving excessive oxygen by body.
(iv) none of these.
Answer:
(ii) receiving insufficient oxygen by body.

6. Why we yawn when we are sleepy or drowsy?
(i) Out of habit.
(ii) To receive extra oxygen.
(iii) It is synchronized with drowsiness.
(iv) None of these.
Answer:
(ii) To receive extra oxygen.

7. Which of the following activities ‘ requires the highest breathing rate?
(i) Sleeping
(ii) Walking
(iii) Studying
(iv) Running.
Answer:
(iv) Running.

Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

8. During inhalation, which of the following does not happen?
(i) Air is drawn in.
(ii) Ribs move out.
(iii) Lungs shrink.
(iv) Diaphragm moves down.
Answer:
(iii) Lungs shrink.

9. Take a wide plastic bottle. Remove the bottom. Get a y-shaped glass. Make a hole in the lid so that the tube may pass through it. To the forked end of the tube fix two deflated balloons. To the open base of the bottle tie a thin rubber using a large band. What does balloons and rubber represent respectively?
(i) Diaphragm, Lungs
(ii) Lungs, Diaphragm
(iii) Ribs, Diaphragm
(iv) Diaphragm, Ribs.
Answer:
(ii) Lungs, Diaphragm.

10. The change in the appearance of lime water to milky on exhalation in it, shows the presence of gas in the exhaled air.
(i) Oxygen
(ii) Carbon dioxide
(iii) Carbon monoxide
(iv) None of these.
Answer:
(ii) Carbon dioxide.

11. The percentage of oxygen and carbon dioxide respectively in inhaled air is :
(i) 21% oxygen, 4% CO2
(ii) 21% oxygen, 0.04% CO2
(iii) 16.4% oxygen, 4.4% CO2
(iv) 16.4% oxygen, 0.44% CO2
Answer:
(ii) 21% oxygen, 0.04% CO2.

12. The percentage of oxygen and carbon dioxide respectively in exhaled air is :
(i) 21% oxygen, 4% CO2
(ii) 21% oxygen, 0.04% CO2
(iii) 16.4% oxygen, 4.4% CO2
(iv) 16.4% oxygen, 0.44% CO2.
Answer:
(iii) 16.4% oxygen, 4.4% CO2.

Respiration in Organisms Class 7 Extra Questions and Answers Science Chapter 10

13. The respiratory organ of insects, earthworm and fish respectively are :
(i) trachea, gills, moist skin
(ii) trachea, moist skin, gills
(iii) skin, trachea, gills
(iv) skin, gills, trachea
Answer:
(ii) trachea, moist skin, gills.

Keywords:

→ Aerobic respiration: When breakdown of glucose occurs with the use of oxygen, it is called aerobic respiration.

→ Anaerobic respiration: When food is broken down without using oxygen, it is called anaerobic respiration.

→ Breathing rate: The number of times a person breathes in a minute is termed as the breathing rate.

→ Cellular respiration: The process of breakdown of food in the cell with the release of energy is called cellular respiration.

→ Diaphragm: A largé, muscular sheet forming the floor of the chest cavity is called diaphragm.

→ Inhalation: The taking in of air rich in oxygen into the body is called inhalation.

→ Gills: Organ for breathing in fish.

→ Exhalation: Giving out air rich in carbon dioxide during respiration is called exhalation.

→ Spiracles: Small openings on the sides of insects’ body meant for respiration are known as spiracles.

→ Tracheae: Insects have a network of air tubes for gas exchange. It is called tracheae.

Extra Questions for Class 7 Science

Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16

Online Education for Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16

Here we are providing Online Education for Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16 was designed by subject expert teachers. https://ncertmcq.com/extra-questions-for-class-7-science/

Online Education for Class 7 Science Chapter 16 Extra Questions and Answers Water: A Precious Resource

Class 7 Science Chapter 16 Extra Questions Question 1.
When is the World Water Day celebration?
Answer:
22 March.

Water Class 7 Questions And Answers Question 2.
What is minimum limit of water prescribed by United Nations?
Answer:
The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene is a minimum of 50 litres per person per day.

Water A Precious Resource Class 7 Extra Questions And Answers Question 3.
How much of earth’s surface is covered by water?
Answer:
About 71%.

Class 7 Science Water Extra Questions Question 4.
How much water (by percentage) is available for us to use?
Answer:
Roughly 0.006%.

Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16

Water: A Precious Resource Class 7 Extra Questions And Answers Question 5.
Where is solid form of water present in the earth?
Answer:
The solid form, snow and ice, is present as ice caps at the poles of the earth, snow-covered mountains and glaciers.

Water A Precious Resource Class 7 Questions And Answers Question 6.
How is water present in the atmosphere?
Answer:
As water vapour.

Water Class 7 Extra Questions Question 7.
What is Baril?
Answer:
Bawri is the traditional way of collecting water.

Ncert Class 7 Science Chapter 16 Extra Questions Question 8.
Which year was observed as International Year of Freshwater and why?
Answer:
Year 2003 was observed as the International Year of Freshwater to make people aware of this dwindling natural resource.

Ncert Solutions For Class 7 Science Chapter 16 Extra Questions Question 9.
Where is most of the water in earth contained?
Answer:
Almost all the water on the earth is contained in the seas and oceans, rivers, lakes, ice caps, as groundwater and in the atmosphere.

Extra Questions Of Water Class 7 Question 10.
Give two tips to save water.
Answer:

  1. Turn off taps while brushing.
  2. Mop the floor instead of washing.

Class 7 Water Extra Questions Question 11.
What could be the effect of scarcity of water?
Answer:
Without water, no animals and plants can survive. The green character of the planet shall be lost. For a world without plants shall mean no food, no oxygen, not enough rain, and innumerable other problems. This may mean the end of all life.

Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16

Ch 16 Science Class 7 Extra Questions Question 12.
How is water distributed on the earth in its three forms?
Answer:
The solid form, snow and ice, is present as ice caps at the poles of the earth, snow-covered mountains and glaciers.

  • Liquid water is present in oceans, lakes, rivers, and even underground.
  • The gaseous form is the^ water vapour present in the air around us.

Class 7 Science Ch 16 Extra Questions Question 13.
Write some methods to save water.
Answer:
Scarcity of water can be tackled only through its judicious use. We cannot create water but can save water. Here are some tips for saving water :

  • While brushing teeth or shaving turn off the water tap until it is time to rinse.
  • Use a bucket of water while washing dishes instead of washing them under the tap.
  • Never put water down the drain when there may be another use for it such as watering a plant in the garden or cleaning.
  • Verify that your home is leak-free. Repair any leakage.
  • Use minimum water for bath. If there is shower in the bathroom, use the ultra-low-flow version and take short showers.
  • Avoid the installation of ornamental water features (such as fountains) unless the water is recycled.
  • Report all significant water losses \(broken pipes, open hydrants, etc.) to the property owner or authorities.
  • Do not pollute water.

Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16

Water: A Precious Resource Class 7 Questions And Answers Question 14.
How is increasing population responsible for depletion of groundwater?
Answer:

  • Increasing population creates demand for construction of houses, shops, offices, roads and pavements. This decreases the open areas like parks and playgrounds. This, in turn, decreases the seepage of rainwater into the ground.
  • Moreover, a huge amount of water is required for construction work. Often groundwater is used for this purpose.
  • So, we are not only consuming more groundwater, but we also are allowing lesser water to seep into the ground. This results in depletion of water table.

Extra Questions On Water Class 7 Question 15.
Explain the factors responsible for the depletion of water table.
Answer:
There are three main causes of depletion of water table:

  • Increasing population: Increasing population creates demand for construction of houses, shops, offices, roads and pavements. This decreases the open areas like parks and playgrounds. This, in turn, decreases the seepage of rainwater into the ground. Along with consumption of water increases.
  • Increasing industries: Water is used by all the industries. The number of industries is increasing continuously. Water used by most of the industries is drawn from the ground.
  • Agricultural activities: These irrigational systems may suffer from lack of water due to erratic rainfall. Therefore, farmers have to use groundwater for irrigation. Population pressure on agriculture forces increasing use of groundwater day by day. This results in depletion of water table.

Class 7 Chapter 16 Science Extra Questions Question 16.
Explain how groundwater is recharged?
Answer:
The rainwater and water from other sources such as rivers and ponds seeps through the soil and fills the empty spaces and cracks deep below the ground. The process of seeping of water into the ground is called infiltration. The groundwater thus gets recharged by this process.

Multiple Choice Questions

1. Which of the following is a correct statement?
(i) Earth has limitless freshwater resource
(ii) Water conservation is just wasteful employment.
(iii) Freshwater reserves are limited and need to be conserved.
(iv) Oceans on the earth are great source of freshwater.
Answer:
(iii) Freshwater reserves are limited and need to be conserved.

2. Which of the following are reserves of freshwater, which can be used readily?
(i) Oceans
(ii) Frozen glaciers, ice caps and perma¬nent snow
(iii) Seas
(iv) Lakes and rivers.
Answer:
(iv) Lakes and rivers.

Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16

3. The water sources that can be used by us are present in quantity on the earth.
(i) enormous
(ii) adequate
(iii) scanty
(iv) more than adequate
Answer:
(iii) scanty.

4. Wells, tube wells or hand pumps get water from :
(i) oceans
(ii) sea
(iii) groundwater
(iv) river.
Answer:
(iii) groundwater.

5. The process of changing water from liquid state to its vapour state is known as :
(i) condensation
(ii) evaporation
(iii) transpiration
(iv) precipitation.
Answer:
(ii) evaporation.

6. Choose the correct one out of the following Statements :
(i) Amount of water in rivers and lakes remain constant.
(ii) Amount of water in oceans remains constant.
(iii) Amount of water in ice caps remains constant.
(iv) Amount of water on earth remains constant.
Answer:
(iv) Amount of water on earth remains constant.

Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16

7. In which of the following ways industries do not harm the water resources?
(i) Excess use of water for industrial purposes.
(ii) Discharging industrial waste in water bodies.
(iii) Extracting electric energy from hydel energy.
(iv) Disturbing ecological setup.
Answer:
(iii) Extracting electric energy from hydel energy.

8. Which of the following regions receives highest rainfall in our country?
(i) Eastern ghats and north-west regions
(ii) Western ghats and north-east regions
(iii) The great plain
(iv) Deccan region
Answer:
(ii) Western ghats and northeast regions.

Keywords:

→ Aquifer: At some places, the groundwater is stored between layers of hard rock below the water table. This is knowñ as an aquifer.

→ Depletion: To lessen.

→ Drip irrigation: Drip irrigation is a technique of watering plants by making use of narrow tubings which deliver water directly at the base of the plant.

Water: A Precious Resource Class 7 Extra Questions and Answers Science Chapter 16

→ Water table: If we dig deep, we would reach a level where all the space between particles of soil and gaps between rocks are filled with water. The upper limit of this layer is called the water table.

→ Groundwater: The water found below the water table is called groundwater.

→ Infiltration: The process of seeping water into the ground is called infiltration.

→ Recharge: Replenish.

→ Water harvesting: The rainwater can be collected and used to recharge the groundwater. This is referred to as water harvesting or rainwater harvesting.

Extra Questions for Class 7 Science

Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

Online Education for Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

Here we are providing Online Education for Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12 was designed by subject expert teachers.  https://ncertmcq.com/extra-questions-for-class-7-science/

Online Education for Class 7 Science Chapter 12 Extra Questions and Answers Reproduction in Plants

Reproduction In Plants Class 7 Extra Questions And Answers Question 1.
What is reproduction?
Answer:
The production of new individuals from their parents is known as reproduction.

Class 7 Science Chapter 12 Extra Question Answer Question 2.
What is cutting?
Answer:
Cutting is to cut piece of a branch of a plant with a pode which is capable of producing new plant under suitable conditions.

Reproduction In Plants Class 7 Questions And Answers Question 3.
Name one plant that can reproduce through leaves.
Answer:
Bryophyllum.

Class 7 Reproduction In Plants Extra Questions Question 4.
What are the male and female reproductive part in plants?
Answer:
The stamens are the male reproductive part and the pistil is the female reproductive part in plants.

Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

Ncert Solutions For Class 7 Science Chapter 12 Extra Questions Question 5.
What are unisexual flowers?
Answer:
The flowers which contain either only the pistil or the stamens are called unisexual flowers.

Reproduction In Plants Class 7 Extra Questions Question 6.
What are bisexual flowers?
Answer:
The flowers which contain both stamens and pistil are called bisexual flowers.

Class 7 Science Chapter 12 Extra Questions Question 7.
What is fruit?
Answer:
Mature ovary is called fruit.

Class 7 Science Ch 12 Extra Questions Question 8.
What are the vegetative parts of plant?
Answer:
Roots, stems and leaves are called the vegetative parts of a plant.

Reproduction In Plants Extra Questions Question 9.
Write the benefits of vegetative propagation.
Answer:
Benefits of vegetative propagation :

  • Plants produced by vegetative propagation take less time to grow and bear flowers and fruits earlier than those produced from seeds.
  • The new plants are exact copies of the parent plant, as they are produced from a single parent.

Ncert Class 7 Science Chapter 12 Extra Questions Question 10.
Where are male and female gametes in flowers?
Answer:
Anther contains pollen grains which produce male gametes. The female gamete or the egg is formed in an ovule, which is a part of ovary.

Extra Questions Of Reproduction In Plants Class 7 Question 11.
Draw figure to show self and cross-pollination.
Answer:
Reproduction In Plants Class 7 Extra Questions And Answers

Class 7 Science Reproduction In Plants Extra Questions Question 12.
Draw a diagram to show vegetative reproduction in bryophyllum.
Answer:
Class 7 Science Chapter 12 Extra Question Answer

Ch 12 Science Class 7 Extra Questions Question 13.
How are plants get benefitted by seed dispersal?
Answer:
Benefits of seed dispersal to plants :

  • It prevents competition between the plant and its own seedlings for sunlight, water and minerals.
  • It also enables the plants to invade new habitats for wider distribution.

Extra Questions On Reproduction In Plants Class 7 Question 14.
We have never seen the seeds of sugarcane, potato and rose. How do these plants reproduce?
Answer:
Sugarcane, potato and rose reproduce by means of vegetative propagation :
Plants Parts used for vegetative propagation

  • Sugarcane Stem (having nodes)
  • Potato Stem (eyed part)
  • Rose Stem (having nodes).

Extra Questions For Class 7 Science Chapter 12 Question 15.
Show fertilisation with the help of diagrams.
Answer:
Reproduction In Plants Class 7 Questions And Answers

Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

Chapter 12 Science Class 7 Extra Questions Question 16.
Describe reproduction in fungus.
Answer:
The fungi on a suitable place grow from spores which are present in the air. When spores are released they keep floating in the air. As they are very light they can cover long distances.

The spores are asexual reproductive bodies. Each spore is covered by a hard protective coat to withstand unfavourable conditions such as high temperature and buy humidity. So they can survive for a long time. Under favourable conditions, a spore germinates and develops into a new individual.

Extra Questions For Class 7 Science Reproduction In Plants Question 17.
Explain the method of reproduction in yeast with the help of a diagram.
Answer:
Yeast is a single-celled organism which reproduces by budding. When it gets sufficient nutrients, a small bulb-like projection starts coming out from it which is called a bud. The bud gradually grows and gets detached from the parent cell and forms a new yeast cell. The new yeast cell grows, matures and produces more yeast cells. Sometimes, another bud arises from the bud forming a chain of buds. If this process continues, a large number of yeast cells are produced in a short time.
Class 7 Reproduction In Plants Extra Questions

Class 7 Chapter 12 Science Extra Questions Question 18.
What do you think will happen if all seeds of a plant were to fall at the same place and grow there?
Answer:
If all seeds of a plant were to fall at the same place and grow there, then there would be severe competition for sunlight, water, mineraLs and space. As a result, the seeds would not grow into healthy plants.

Question 19.
Describe the different methods of asexual reproduction. Give examples.
Answer:
Various methods of asexual reproduction are :
(i) Vegetative propagation: It is a type of asexual reproduction in which new plants are produced frorìi roots, stems, leaves and btids. Since reproduction is through the vegetative parts of the plant, it is known as negetative propagation. rose, sugarcane.

(ii) Budding: Here, the small bulb-like projection comes out from body of an organism is called a bud, which gradually grows and gets detached from the parent cell and forms organism, e.g., yeast. The new yeast grows, matures and produces more yeasts.

(iii) Fragmentation: This type of reproduction is common in algae. When water and nutrients are available, algae grow and multiply rapidly by fragmentation. An alga breaks up into two or more fragments. These fragments or pieces grow into new individuals. This process continues and they cover a large area in a short period of time.

(iv) Spore formation: The spores are asexual reproductive bodies. Each spore is covered by a hard protective coat to withstand unfavourable conditions such as high temperature and low humidity. So they can survive for a long time. Under favourable conditions, a spore germinates and develops into a new individual. Plants such as moss and ferns also reproduce by means of spores. Fungi too reproduce by spore formation.

Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

Question 20.
Explain what you understand by sexual reproduction.
Answer:
Sexual reproduction: It is a type of reproduction in which two different parent cells (male and female) are required. In this type of reproduction, a male and a female gamete fuse to form a zygote. The process of fusion of male and female gametes (to form a zygote) is called fertilisation.

The zygote develops into an embryo, while the triploid endosperm (one male cell plus two female cells) and female tissues of the ovule give rise to the surrounding tissues in the developing seed. The ovary, then grows into a fruit, which surrounds the seed(s). The seed contains an embryo enclosed in a protective seed coat.
In sexual reproduction, new plants are grovn from seeds.

Question 21.
Explain the difference between self-pollution and cross-pollination.
Answer:
If the pollen lands on the stigma of the same flowers it is called self-pollination.
When the pollen of a flower lands on the stigma of another flower of the same plant, or that of a different plant of the same kind, it is called cross-pollination.

Question 21.
How does the process of fertilisation take place in flowers?
Answer:
After pollination, the anther settles on the stigma of flower, which compels the formation of pollen tubes to the ovules. The male gamete present in the pollen grain moves through the pollen tube and fertilises the ovum present in the ovule, i.e., fertilisation takes place. The fertilisation leads to the formation of zygote which later develops into an embryo.

Question 22.
Describe the various ways by which seeds are dispersed.
Answer:
Seeds and fruits of plants are carried away by wind, water and animals.
(i) Winged seeds such as those of drumstick and maple, light seeds of grasses or hairy seeds of aak (Madar) and hairy fruit of sunflower get blown off with the wind to faraway places.

(ii) Some seeds are dispersed by water. These fruits or seeds usually develop floating ability the form of spongy or fibrous outer coats as coconut.

(iii) Some seeds are dispersed by animals, especially spiny seeds with hooks which get attached to the bodies of animals and are carried to distant places. Examples are Xanthium and Urena.

(iv) Some seeds are dispersed when the fruits burst with sudden jerks. The seeds are scattered far from the parent plant. This happens in the case of castor and balsam.

Multiple Choice Questions

1. The type of reproduction in which new plants are produced from roots, stems, leaves and buds, is known as :
(i) budding
(ii) vegetative propagation
(iii) sexual reproduction
(iv) none of these.
Answer:
(ii) vegetative propagation.

2. The cut-off branch or stem with a node, used for vegetative propagation is known as :
(i) cutting
(ii) stem branch
(iii) node stem
(iv) noded branch.
Answer:
(i) cutting.

3. Apart from flower buds, there are buds in the axil (point of attachment of the leaf at the node) of leaves. These buds are known as vegetative buds. Later they develop into :
(i) roots
(ii) shoots
(iii) leaves
(iv) flowers.
Answer:
(ii) shoots.

Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

4. Potatoes vegetatively propagate through :
(i) cutting
(ii) eyes (buds)
(iii) leaves
(iv) branch node.
Answer:
(ii) eyes (buds).

5. Which of the following does not propagate from the scar on the stem?
(i) Potato
(ii) Turmeric
(iii) Ginger
(iv) Rose.
Answer:
(iv) Rose.

6. Which of the following plants propagates from buds in the margin of leaf?
(i) Rose
(ii) Shoe flower
(iii) Bryophyllum
(iv) Hydrophyllum.
Answer:
(iii) Bryophyllum.

7. Which of the root of the following use for propagation?
(i) Sweet potato
(ii) Potato
(iii) Turmeric
(iv) Sugarcane.
Answer:
(i) Sweet potato.

8. Yeast reproduces by the asexual reproduction known as :
(i) budding
(ii) spore formation
(iii) fragmentation
(iv) vegetative propagation
Answer:
(i) budding.

Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

9. Spirogyra (an alga) reproduces by the process of:
(i) budding
(ii) fragmentation
(iii) spore formation
(iv) vegetative propagation.
Answer:
(ii) fragmentation.

10. Fungus reproduces by the process of:
(i) budding
(ii) fragmentation
(iii) spore formation
(iv) vegetative propagation.
Answer:
(iii) spore formation.

11. Which of the following have unisexual flowers?
(i) Mustard
(ii) Rose
(iii) Petunia
(iv) Papaya.
Answer:
(iv) Papaya.

12. Which of the following have bisexual flowers?
(i) Petunia
(ii) Corn
(iii) Papaya
(iv) Cucumber.
Answer:
(i) Petunia.

13. Which among the following contains the male gametes?
(i) Ovary
(ii) Stigma
(iii) Anther
(iv) Style.
Answer:
(iii) Anther.

14. Which among the following contains the ovule(s)?
(i) Stigma
(ii) Style
(iii) Anther
(iv) Ovary.
Answer:
(iv) Ovary.

15. When the pollens of a flower lands on the stigma of another flower of the same plant the pollination type is called
(i) self-pollination
(ii) cross-pollination
(iii) xeno-pollination
(iv) none of these.
Answer:
(ii) cross-pollination.

16. The cell which results after fusion of the gametes is called a/an :
(i) embryo
(ii) zygote
(iii) polar cell
(iv) none of these.
Answer:
(ii) zygote.

17. Seeds of which of the following plants are dispersed by water?
(i) Coconut
(ii) Drumstick
(iii) Maple
(iv) Sunflower
Answer:
(i) Coconut.

Keywords:

→ Asexual Reproduction: The reproduction in which plants can give rise to new plants without seeds.

→ Budding: The reproduction through small bulb-like projéction called a bud, coming out from the body of the organism is called budding.

→ Embryo: The zygote develops into an embryo. It is the baby plant.

→Fertilisation: The process of fusion of male and female gametes (to form a zygote) is called fertilisation.

→ Fragmentation: The process of reproduction in which the organism breaks up into pieces and each piece grows into new organism is called fragmentation. e.g., Algae.

Reproduction in Plants Class 7 Extra Questions and Answers Science Chapter 12

→ Gametes: Reproductive cell are called gametes.

→ Hydra: A microscopic aquatic animal.

→ Ovule: The part of ovary, in which female gamete or the egg is formed.

→ Pollen grain: Male reproductive cells present on anther.

→ Pollen tube: The tube formed due to deposition of anther on stigma for the fertilisation in flower.

→ Pollination: The transfer of pollen from the anther to the stigma of a flower is called pollination.

→ Seed dispersal: The movement of seeds from the plant to another place where it can germinate, is called seed dispersal.

→ Sexual reproduction: A type of reproduction where two different parent cells (male and female) are required is called asexual reproduction.

→ Spore: Spores are asexual reproductive bodies covered by a hard protective coat to withstand unfavourable conditions. Plants such as moss and ferns reproduce by means of spores.

→ Sporangium: A sporangium is a plant or fungal structure producing and containing spores.

→ Vegetative reproduction: It is a type of asexual reproduction in which new plants are produced from roots, stems, leaves and buds. Since reproduction is through the vegetative parts of the plant, it is known as vegetative propagation.

→ Zygote: Cell formed after the fertilization of a male and a female gamete is called zygote.

Extra Questions for Class 7 Science

Class 8 Geography Chapter 5 Extra Questions and Answers Industries

Online Education for Class 8 Geography Chapter 5 Extra Questions and Answers Industries

Check the below Online Education NCERT MCQ Questions for Class 8 Geography Chapter 5 Extra Questions and Answers Industries Pdf free download. https://ncertmcq.com/extra-questions-for-class-8-social-science/

Online Education for Industries Class 8 Extra Questions Geography Chapter 5

Class 8 Geography Chapter 5 Extra Questions And Answers Question 1.
On what basis industries can be classified?
Answer:
Industries can be classified on the following bases –

  • raw materials,
  • size,
  • ownership.

Class 8 Geography Chapter 5 Extra Questions Question 2.
Classify the industries on the basis of ownership.
Answer:
Private sector, state-owned or public sector, joint sector and co-operative sector.

Chapter 5 Industries Class 8 Extra Questions Question 3.
Name the major industrial regions of the world.
Answer:

  • Eastern North America,
  • Western and Central Europe,
  • Eastern Europe,
  • Eastern Asia.

Industries Class 8 Questions And Answers Question 4.
Why do industrial accidents or disasters occur?
Answer:
Industrial accidents occur mainly due to technical failure or irresponsible handling of hazardous material.

Industries Class 8 Extra Questions Question 5.
Name the countries where iron and steel industry is located.
Answer:
Germany, USA, China, Japan and Russia.

Extra Questions For Class 8 Geography Chapter 5 Question 6.
In which countries is textile industry concentrated?
Answer:
India, Hong Kong, South Korea, Japan and Taiwan.

Class 8 Geography Chapter 5 Extra Questions and Answers Industries

Class 8 Geography Chapter 5 Short Extra Questions Question 7.
In which countries do the major hubs of Information Technology (IT) industry lie?
Answer:

  • Silicon Valley in Central California.
  • Bangalore region of India.

Class 8 Industries Extra Questions Question 8.
Why is iron and steel industry called a feeder industry?
Answer:
Iron and steel industry is called a feeder industry because its products are used as raw materials for other industries.

Industries Class 8 Extra Questions And Answers Question 9.
Write the names of great lakes of North America.
Answer:
Superior, Huron, Ontario, Michigan and Erie.

Ncert Class 8 Geography Chapter 5 Extra Questions Question 10.
Name the regions of Pittsburgh where large steel mills are located.
Answer:

  • Valley of Monogahela river.
  • Valley of Allegheny river.
  • Along the river Ohio.

Geography Class 8 Chapter 5 Extra Questions Question 11.
Give examples of natural fibres.
Answer:
Wool, silk, cotton, linen and jute.

Chapter 5 Geography Class 8 Extra Questions Question 12.
Give examples of man-made fibres.
Answer:
Nylon, polyester, acrylic, rayon.

Extra Questions On Industries Class 8 Question 13.
Which countries are the important producers of cotton textiles?
Answer:
India, China, Japan and USA.

Class 8 Geography Ch 5 Extra Questions Question 14.
India has a glorious tradition of producing good quality cotton textiles. Give examples of Indian handspun and handwoven cloth.
Answer:

  • Muslins of Dhaka
  • Chintzes of Masulipatnam
  • Calicos of Calicut
  • Gold-wrought cotton pieces of Burhanpur, Surat and Vadodara.

Class 8th Geography Chapter 5 Extra Questions Question 15.
When and where was the first successful modem textile mill established?
Answer:
In 1854 at Mumbai.

Class 8 Geography Chapter 5 Extra Questions and Answers Industries

Question 16.
Name an important textile centre of Japan.
Answer:
Osaka is an important textile centre of Japan. It is also known as ‘Manchester of Japan’.

Question 17.
From which countries does Japan import cotton?
Answer:
Egypt, India, China and USA.

Question 18.
Which industries have replaced the cotton textile industry of Osaka?
Answer:
Iron and steel, machinery, ship¬building, automobiles, electrical equipments and cement.

Question 19.
Define Information Technology industry.
Answer:
The information technology industry deals in the storage, processing and distribution of information.

Question 20.
Which factors guide the location of IT industry?
Answer:
Resource availability, cost and infrastructure.

Question 21.
Name the major hubs of the IT industry.
Answer:

  • Silicon Valley, California
  • Bangalore, India.

Question 22.
What do you understand by secondary activities? Explain with the help of example.
Answer:
Secondary activities change raw materials into products of more value to people. For example, pulp is changed into paper and paper into a notebook.

Question 23.
Explain how products of mineral-based industries feed other industries.
Answer:
Iron made from iron-ore is the product of mineral-based industry. This is used as raw material for the manufacture of various products such as heavy machinery, building materials and railway coaches.

Class 8 Geography Chapter 5 Extra Questions and Answers Industries

Question 24.
What is the difference between private sector and public sector industries?
Answer:
Private-sector industries are owned and operated by individuals or a group of individuals. Public sector industries are owned and operated by the government.

Question 25.
Write the difference between joint sector and co-operative sector industries.
Answer:
Joint sector industries are owned and. operated by the state and individuals or a group of individuals.
Co-operative sector industries are owned and operated by the producers or suppliers of raw materials, workers or both.

Question 26.
Name the major industrial regions of India.
Answer:

  • Mumbai-Pune cluster
  • Bangalore-Tamil Nadu region
  • Hugli region
  • Ahmedabad-Baroda region
  • Chottanagpur industrial belt
  • Visakhapatnam-Guntur belt
  • Gurgaon-Delhi-Meerut region
  • Kollam-Thiruvananthapuram region.

Question 27.
What was the cause of industrial disaster which occurred in Bhopal on 3 December 1984?
Answer:
The industrial disaster in Bhopal on 3 December 1984 occurred due to the leakage of highly poisonous Methyl Isocyanate (MIC) gas along with Hydrogen Cyanide and other reactive products.

Question 28.
What are ‘Sunrise Industries’? Give examples of such industries.
Answer:
Emerging industries are also known as ‘Sunrise Industries’. For example, Informa¬tion Technology, Hospitality and Knowledge.

Question 29.
Mention the inputs of iron and steel industry.
Answer:
The inputs of iron and steel industry are –

  • Raw materials – iron-ore, coal, limestone
  • labour,
  • capital,
  • land,
  • other infrastructure.

Question 30.
Write two characteristics of steel.
Answer:

  1. Steel is hard and it can easily be shaped, cut or made into wire.
  2. Special alloys of steel can be made by adding other metals like aluminium, nickel and copper. It gives unusual hardness, toughness or ability to resist rust.

Question 31.
After 1950, why did iron and steel industry begin to be located on flat land and near seaports?
Answer:
After 1950 iron and steel industry began to be located on flat land near seaports because steelworks had become very large and iron-ore had been imported from overseas.

Question 32.
Name the import steel-producing centres of India. Also, mention the states where they are located.
Answer:

Steel producing centres States where they are located
1. Bhilai Chhattisgarh
2. Durgapur, West Bengal
3. Burnpur West Bengal
4. Jamshedpur, Jharkhand
5. Bokaro Jharkhand
6. Rourkela Orissa
7. Bhadravati, Karnataka
8. Vijaynagar Karnataka
9. Visakhapatnam Andhra Pradesh
10. Salem Tamil Nadu

Question 33.
Why has the cotton textile industry spread to different parts of the country?
Answer:
Cotton textile industry has spread to different parts of the country because :

  • Raw cotton is a pure and lightweight raw material.
  • Humidity can be created artificially which is important for cotton textile.

Question 34.
Why could traditional cotton textile not compete with new textile mills of the West (Europe)?
Answer:

  • The production of handwoven cotton textile was expensive and time-consuming.
  • Textile mills of the West (Europe) produced cheap and good quality fabrics.

Question 35.
Name some major cotton textile centres of India.
Answer:
Coimbatore, Kanpur, Chennai, Ahmedabad, Mumbai, Kolkata, Ludhiana, Pondicherry and Panipat.

Question 36.
Why have textile mills been closed down in Ahmedabad?
Answer:
Textile mills have been closed down in Ahmedabad because:

  • New textile centres have emerged in India.
  • Machines and technology have not been upgraded.

Question 37.
Name the two major hubs of IT industry. Also, write their locations.
Answer:

  1. Bangalore is located on the Deccan Plateau of India.
  2. Silicon Valley is a part of Santa Clara Valley, located next to the Rocky Mountains of North America.

Question 38.
Name some emerging information technology hubs in India.
Answer:
Mumbai, New Delhi, Hyderabad, Chennai, Gurgaon, Pune, Thiruvananthapuram, Kochi and Chandigarh.

Question 39.
On the outline map of India show the following places. Ahmedabad.
Answer:
Ahmedabad.

Class 8 Geography Chapter 5 Extra Questions and Answers Industries

Question 40.
Which industry is often referred to as the backbone of modern industry and why?
Answer:
Iron and steel industry is often referred to as the backbone of modem industry because almost everything we use is either made of iron or steel or has been made with tools and machinery of these metals.

Question 41.
How can industries be classified on the basis of raw materials? Explain.
Answer:
On the basis of raw materials, industries can be classified in the following ways –

  • Agro-based industries use plant and animal-based products as their raw materials. For example, food processing.
  • Mineral-based industries use mineral ores as their raw material. For example, iron and steel industry.
  • Marine-based industries use products from the sea and oceans as raw materials. For example, manufacturing of fish oil.
  • Forest-based industries utilise forest produce as raw materials. For example, paper and pulp, furniture and building.

Question 42.
What do you understand by Industrial System? Explain with the help of an example.
Answer:
Industrial System consists of inputs, processes and outputs.

  • The inputs are raw materials, labour, cost of land, transport, power etc.
  • The processes include a wide range of activities that convert the raw materials into finished products.
  • The outputs are the end products and the income is earned from it.

For example, in textile industry the inputs are cotton, labour, factory building, transport cost, etc. The processes include ginning, spinning, weaving, dyeing and printing. The output are the garments like shirt, trousers, etc.

Question 43.
Describe the utility of steel in our day-to-day life.
Or
Explain how steel is the backbone of modern industry.
Answer:

  • Various modes of transport like ships, trains, trucks and autos are made of steel.
  • The safety pins and the needles are also made of steel.
  • Oil wells are drilled with steel machinery. Steel pipelines transport oil.
  • Minerals are mined with steel equipment.
  • Farm machines are made up of steel.
  • Large buildings have steel frameworks.

Question 44.
Why was Sakchi (near Jamshedpur) chosen to set up the steel plant (TISCO)? Give reasons.
Answer:
Sakchi was chosen to set up the steel plant (TISCO) for various reasons –

  • It was close to the iron ore, coal and manganese deposits. TISCO gets coal from Jharia coalfields and iron-ore, limestone, dolomite and manganese from Orissa and Chhattisgarh.
  • The Kharkai and Subarnarekha rivers ensured sufficient water supply.
  • Kolkata provided a large market.
  • Government initiatives provided adequate capital for its later development.

Question 45.
Describe the locational advantages of Pittsburgh steel city in the United States of America.
Answer:
Locational advantages df Pittsburgh steel city –

  • Coal is available locally.
  • Iron-ore comes from the iron mines at Minnesota, about 1500 km from Pittsburgh.
  • The world’s best route – the famous Great Lakes waterway is available for shipping ore cheaply.
  • Trains carry the ore from the Great Lakes to the Pittsburgh area.
  • The Ohio, the Monogahela and Allegheny rivers provide adequate water supply.

Question 46.
Describe the favourable locational factors that were responsible for the development of the textile industry in Ahmedabad.
Answer:

  • Ahmedabad is situated in the “heart of a cotton-growing area. This ensures easy availability of raw material.
  • The humid climate is ideal for spinning and weaving.
  • The flat terrain is suitable for the establishment of the mills.
  • The densely populated states of Gujarat and Maharashtra provide both skilled and semi-skilled labour.
  • There are well-developed road and railway network.
  • Nearby Mumbai port facilitates import of machinery and export of cotton textiles.

Question 47.
Why has the textile industry developed in Osaka (Japan)?
Or
Describe the geographical factors responsible for the location of textile industry in Osaka (Japan).
Answer:

  • The extensive plain around Osaka ensured the availability of land for the growth of cotton mills.
  • Warm humid climate is well suited to spinning and weaving.
  • The river Yodo provides sufficient water for the mills.
  • Labour is easily available.
  • Location of port facilitates import of raw cotton and for exporting textiles.

Question 48.
Explain the classification of Industries
Answer:
Industries can be classified on the following basis –
Raw Materials-Agro-based and mineral-based like food processing iron and steel industry.

Question 49.
Explain the factors influencing the location of an industry.
Answer:
Factors which affect the location of an industry are:

  • Availability of raw materials
  • land
  • water
  • labour
  • power
  • capital
  • transport
  • market
  • government policies
  • communication.

Class 8 Geography Chapter 5 Extra Questions and Answers Industries

Multiple Choice Questions (MCQs)

1. Industry refers to …………………………….. activity that is concerned with production of goods, extraction of minerals or the provision of services.
(a) apolitical
(b) a social
(c) a cultural
(d) an economic
Answer:
(d) an economic.

2. What is not true about cottage industry?
(a) It is a type of small scale industry.
(b) Its products are manufactured by machines.
(c) It is also known as household industry.
(d) Basket weaving is a cottage industry.
Answer:
(b) Its products are manufactured by machines.

3. The processes such as ginning, spinning, weaving, dyeing and printing are associated with the industry.
(a) steel industry
(b) chemical
(c) textile
(d) paper
Answer:
(c) textile.

4. operate for profit in the market.
(а) Government
(b) Private Companies
(c) Cooperative Societies
Answer:
(b) Private Companies.

Class 8 Geography Chapter 5 Extra Questions and Answers Industries

Glossary:

→ Secondary activities or Manufacturing – These activities change raw materials into products of more value to people.

→ Industry- It refers to an economic activity that is concerned with production of goods, extraction of minerals or the provision of services.

→ Agro-based industries – These industries use plant and animal-based products as their raw materials.

→ Mineral-based industries – These industries use mineral ores as their raw materials.

→ Marine-based industries – These industries use products from sea and oceans as raw materials.

→ Forest-based industries – These industries utilise forest product as raw materials.

→ Cottage or household industries – Here products are manufactured by hand by the artisans.

→ Private sector industries – These are owned and operated by individuals or a group of individuals.

→ Public sector industries – These are owned and operated by the government.

→ Joint sector industries – These are owned and operated by the state and individuals or a group of individuals.

→ Co-operative sector industries – These are owned and operated by the producers or suppliers of raw materials.

→ Smelting- It is the process in which metals are extracted from their ores by heating beyond the melting point.

→ TISCO – Tata Iron and Steel Company.

→ Information Technology – This industry deals in storage, processing and distribution of information.

Extra Questions for Class 8 Social Science

Class 7 Civics Chapter 6 Extra Questions and Answers Understanding Media

Online Education for Class 7 Civics Chapter 6 Extra Questions and Answers Understanding Media

Check the below Online Education NCERT MCQ Questions for Class 7 Civics Chapter 6 Extra Questions and Answers Understanding Media Pdf free download. https://ncertmcq.com/extra-questions-for-class-7-social-science/

Online Education for Understanding Media Class 7 Extra Questions Civics Chapter 6

Class 7 Civics Chapter 6 Extra Questions Question 1.
What is media?
Answer:
All means of communication are collectively referred to as media.

Understanding Media Class 7 Extra Questions Question 2.
Why are newspapers called print media?
Answer:
The newspapers are called print media, because these newspapers use print technology in reporting their news, etc.

Understanding Media Class 7 Worksheet With Answers Question 3.
What is censorship?
Answer:
When the government prevents media from making a news or programme or their parts public, it is called censorship.

Class 7 Civics Chapter 6 Extra Questions and Answers Understanding Media

Understanding Media Class 7 Questions And Answers Question 4.
What do you mean by mass media?
Answer:
Those forms of media that reaches millions of people or the masses, across the country and the world, are called mass media. For example, Television, radio and newspapers.

Class 7 Civics Chapter 6 Extra Questions And Answers Question 5.
How does the technology help media?
Answer:
The technology helps media to reach more people. It also improves the quality of print, sound and the images that reaches to the public.

Understanding Media Class 7 Extra Questions And Answers Question 6.
What role does media play in democracy?
Answer:

  • In democracy, the media plays a significant role in providing news arid discussing events that generally takes place in the country and the world.
  • Through these news the citizen come to know about the work of the government and decide their action.

Class 7 Civics Ch 6 Extra Questions Question 7.
What is the role of TV in our live?
Answer:

  • At present we can not imagine oiribes without TV. It has made us the members of the world community.
  • It allows us to view news and entertainment ctannels across the world through satellites and cables.
  • We can see live telecasts of any event, natural calamities, etc., happening in one, corner while sitting in other corners of the world. Thus, the TV has changed the world into a small village.

Class 7 Civics Chapter 6 Extra Questions and Answers Understanding Media

Multiple Choice Questions (MCQs)

1. Which one of the following terms is used to refer to the radio, TV, newspapers, internet and several forms of communications?
(a) LCD
(b) Mass Media
(c) Print Media
(d) Electronic Media.
Answer:
(b) Mass Media

Understanding Media Extra Questions

2. Which one of the following is an example of Print Media?
(a) Newspapers
(b) TV
(c) Radio
(d) Internet.
Answer:
(a) Newspapers.

Ncert Class 7 Civics Chapter 6 Extra Questions

3. Which one of the following is different from the other three, \Vith reference to the electronic media?
(a) TV
(b) Radio
(c) Stereo
(d) Magazines.
Answer:
(d) Magazines.

Class 7 Civics Chapter 6 Extra Questions and Answers Understanding Media

Class 7 Civics Understanding Media Extra Questions

4. Which one of the following is false about the changing technology?
(а) It improves the quality of sound.
(b) It can’t be used anytime and anyplace.
(c) It improves the images.
(d) It helps media to reach more and more people.
Answer:
(b) It can’t be used anytime and anyplace.

Chapter 6 Civics Class 7 Extra Questions

5. Television images travel huge distances through;
(а) electricity
(b) satellites and cables
(c) new technology
(d) improved machines.
Answer:
(b) satellites and cables.

Ch 6 Civics Class 7 Extra Questions

6. Which one of the following is mainly associated with Japan and United States?
(a) Serials
(b) Movies
(c) News
(d) Cartoon.
Answer:
(d) Cartoon.

Ncert Solutions For Class 7 Civics Chapter 6 Extra Questions

7. Which, one of the following statements is true about the independent media?
(a) It should be controlled by high-class people.
(b) It should be controlled by university students.
(c) It should not be controlled and influenced by any organisation.
(d) It should be controlled by the government.
Answer:
(c) It should not be controlled and influenced by any organisation.

Class 7 Civics Chapter 6 Extra Questions and Answers Understanding Media

Class 7 Civics Chapter 6 Question Answer

8. Which one of the following is important in a democracy? ,
(a) Independent media
(b) TVs
(c) Radios
(d) Newspapers.
Answer:
(a) Independent media.

Media And Democracy Class 7 Questions And Answers

9. Why is the media far from independence?
(а) Government’s control on the media
(b) Because it shows news only
(c) Because of the lack of entertainment
(d) Because they need money from big organisations.
Answer:
(а) Government’s control on the media.

Class 7 Civics Chapter 6 Questions And Answers

10. In which one of the following periods, the media was censored by the government?
(a) 1990-1991
(b) 1975-1977
(c) 1976-1980
(d) 1980-1985.
Answer:
(b) 1975-1977.

Extra Questions On Understanding Media Class 7

11. The media influence our;
(a) food habits
(b) clothing
(c) lifestyle
(d) thoughts, feelings and actions.
Answer:
(d) thoughts, feelings and actions.

Extra Questions For Class 7 Civics Chapter 6

12. Which one of the following newspapers is run by eight Dalit women in Uttar Pradesh?
(a) Janata
(b) Khabar Lahriya
(c) Maro Gaun
(d) Meri Baat
Answer:
(b) Khabar Lahriya.

Important Terms:

Publish: Publish means to produce or print news reports, articles, interviews, stories, etc., in newspapers, magazines, journals and books for a wide audience to read.

Censorship: Censorship is the power that authorises the government to examine material or certain stories that is to be published and ban anything considered offensive or a threat to security either in part or whole of a media, i.e., book, film, newspapers, etc.

Broadcast: Broadcast is the process of transmission of different types of informative popular programmes by radio or television to aware and entertains the people.

Public protest: Public protest is a powerful way by which a large number of people come together and openly state their opposition to some issues or draw attention to injustices. It is generally done by organising public rallies and demonstrations, starting a signature campaign, blocking roads, etc.

Extra Questions for Class 7 Social Science

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Online Education for Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Check the below Online Education NCERT MCQ Questions for Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics Pdf free download. https://ncertmcq.com/extra-questions-for-class-9-social-science/

Online Education for Electoral Politics Class 9 Extra Questions Civics Chapter 4

Electoral Politics Class 9 Extra Questions Question 1.
What is considered as the barometer of democracy?
Answer:
Elections.

Electoral Politics Class 9 Extra Questions Learn Insta Question 2.
What is known as the lifeline of the election procedure?
Answer:
The political parties are known as the lifeline of the election procedure.

Class 9 Civics Chapter 4 Question Answers Question 3.
Name the state where the National Conference is active in politics.
Answer:
Jammu and Kashmir.

Class 9 Civics Chapter 4 Extra Questions And Answers Question 4.
In which state AI’ADMK is a prominent party?
Answer:
In Tamil Nadu.

Electoral Politics Class 9 Important Questions Question 5.
What is the name of the Chief Election Commissioner during whose tenure a large number of electoral -reforms were carried out?
Answer:
T. N. Seshah.

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Electoral Politics Class 9 Extra Questions And Answers Question 6.
What are the means Of electronic media?
Answer:

  • Radio,
  • Television,
  • Cinema.

Electoral Politics Class 9 Important Questions Answers Question 7.
By whom the election procedure of our country is controlled?
Answer:
By the Election Commission.

Ncert Solutions For Class 9 Civics Chapter 4 Extra Questions Question 8.
What is the election called which is held when Lok Sabha or the State Assembly is dissolved before die expiry of its full term?
Answer:
Mid-term election.

Class 9 Electoral Politics Extra Questions Question 9.
What is meant by an election?
Answer:
An election is the contest which is held between different political parties in order to get people’s support.

Electoral Politics Class 9 Extra Questions Learninsta Question 10.
On which principle is the system of universal adult franchise based?
Answer:
On the principle of “one person one vote”.

Extra Question Answer Of Chapter 4 Civics Class 9th Question 11.
What do you mean by the democracy?
Answer:
Democracy is the form of the government “which is elected by the people, ruled by the people and works for the welfare of the people.

Class 9 Political Science Chapter 4 Extra Questions Question 12.
What is meant by the political equality?
Answer:
Political equality is the situation every political party has equal right to fight’ elections.

Class 9 Civics Chapter 3 Electoral Politics Extra Questions And Answers Question 13.
What is the difference between a party candidate and independent candidate?
Answer:
A party candidate fights an election on the basis of the principles of the party he belongs. He uses the party election symbol as his election symbol. On the other hand, an independent candidate fights election on his own principles. He uses the symbol provided, by the Election Commission specially to him.

Electoral Politics Class 9 Learn Insta Question 14.
Why are the symbols allotted to die political parties?
Answer:
The parties are allotted different symbols so that they can have their distinct identity and a voter can easily identify to which party candidate he is going to vote.

Electoral Politics Class 9 Questions Answers Question 15.
Which political party did Chaudhary Devi Lai form in 1987?
Answer:
Lok Dal.

Question 16.
Which movement did Chaudhary Devi Lai launch in 1987?
Answer:
Nyaya Yudh.

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Question 17.
Which party ruled before the elections in Haryana before 1987?
Answer:
The Congress Party.

Question 18.
Which party formed the government after 1987 elections?
Answer:
The Lok Dal.

Question 19.
Was Devi Lai very popular at that time?
Answer:
Yes, Devi Lai was very popular at. that time.

Question 20.
Did Lok Dal make arty promises to people?
Answer:
The Lok Dal headed by Devi Lai promised to build a new Haryana.

Question 21.
Did Devi Lai fulfil promise to waive farmer loans on becoming Chief Minister?
Answer:
Yes, after, becoming Chief Minister, Devi Lai fulfilled the promise he made in election campaign by passing an order waiving the loans of the farmers, agricultural labourers, and small shopkeepers.

Question 22.
Devi Lai had not given any manifesto to the people. What are the other means by which people could know about his priorities?
Answer:
Devi Lai’s approach was direct- talking to liis audience.

Question 23.
What are the different methods used by political parties during the election campaign to seek vote?
Answer:
Processions, public meetings, door to door campaign, holding corner meetings, distributing pamphlets, badges etc.

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Question 24.
How many seats did the Lok Dal also capture in the 1987 elections?
Answer:
60 seats out of 90; Lok Dal together with Bhartiya Janata Party captured 76 seats.

Question 25.
How many seats did the Congress Party obtain in 1987?
Answer:
5 seats.

Question 26.
Why are elections considered essential for any representative democracy in our times?
Answer:
The elections are considered essential for democracy because of the following reasons :

  • The voters are able to choose who will make laws for them.
  • They can choose who will sit in government and take major decisions.
  • They can choose the party whose ‘ policies will guide the government and lawmaking.

These choices are not made once and for all. In democratic elections, the people get a chance to make a fresh choice after some time. If they want they can retain the same party’, the same government and the same representatives. But if they are hot, satisfied with the performance of any of these, they can make a change at that level or at all the levels. This ensures that representatives remain answerable to the people.

Question 27.
It is said that the elections are about political competition. Explain.
Answer:
Elections are all about political competition. The competition takes various forms. The most obvious form is the competition among political parties. At the level of constituency, it takes the form of competition among several candidates. Very often the competition turns into a personality race among the top leaders of various parties. Elections also involve competition among various policies and ideologies. If there is no competition, there is no point in having elections.

Question 28.
“Political competition provide a system of rewards and punishment”. Discuss.
Answer:
Political competition provides a system of rewards and punishment. It is a system where political leaders are rewarded for good work and punished for not serving the people. It is like school examinations; There is no need for examination if we could be sure that all the students will study sincerely all the times. But we cannot be sure of that. That is why, We have examinations as a system of rewards and punishment.

Question 29.
A political party won the elections in 1986. Since then no new elections have taken place and that party continues to run the government. Is this country democratic today? Give your reasons to argue for or against it? Why should it be necessary to contest elections again and again?
Answer:
In any democracy, elections have not to be only free and fair, they have to be conducted timely also, A political party, winning the elections and forming the government can not remain in power forever, nor that country be called democratic. For a country to be called democratic, elections have to be conducted frequently, i.e. at fixed times, and regularly as well.

Question 30.
Based on this account of Haryana. elections, are the following statements correct? Give facts from that example to support what you say.
(a) The party that ruled before the elections and the one that formed government after the elections was the same.
(b) Devi Lai fulfilled his promise to waive farmer loans on becoming chief minister.
(c) People vote. They can vote in support of existing government or support another party.
(d) Members of the majority party elect their leader. This person becomes the chief minister.
(e) Political parties tell the voters as to what they would do if voted to power.
(f) Political parties make their promises’ known to voters in a statement, called election manifesto.
(g) The contesting parties appeal to voters on the basis of a slogan.
Answer:
(a) No, party that ruled before the elections was the Congress Party; party that ruled after the elections was the Lok Dal
(b) It is correct: Devi Lai fulfilled the promise to waive the farmers’ loans after he took over as the chief minister.
(c) Yes, by voting, the people either support the existing, government or can support another party.
(d) True, the members of the legislature belonging to the majority party elect their leader; the leader is appointed, the chief minister, if the party belongs to a state.
(e) This is done by the political parties by issuing its election manifesto; promises made to the voters.
(f) Correct: this is what the election manifesto does.
(g) This is also true; numerous political parties resort to slogans. Devi Lai used the slogan in 1987; it was ‘Bharashtachar band aur pani ka prabhandh.

Question 32.
What type of legal declaration is given when the nomination form is filled?
Answer:
Every candidate, contesting elections, has to make a legal declaration giving details of:

  • Serious criminal cases pending against them.
  • Details of their and their family assets and liabilities.
  • Education qualifications.

This system was started after, an important judgement of the Supreme Court of India.

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Question 33.
What may be the reason to insist on a detailed statement of assets and liabilities?
Answer:
The reason to insist on a detailed statement of assets and liabilities is to avoid the risk of the candidate’s amassing money through unfair means.

Question 34.
Give some of the successful slogans by different political parties in various elections in India in the past.
Answer:
Some of the successful slogans are asunder:
The Congress party led by Indira Gandhi gave the slogan of “Remove Poverty” (Garibi Hatao) in the Lok Sabha elections of 1971. The party promised to recurrent all the policies of the government to remove poverty from the country.

“Save Democracy” was the slogan used by Janata Party in the next Lok Sabha election held in 1977. The party promised to undo the excesses committed during Emergency and restore civil liberties.

The Left Front used the slogan of “Land to the Tiller” in the West Bengal assembly elections held in 1977.
“Protect the Self-Respect of the Telugus” was the slogan used by N. T. Rama Rao, the leader of the Telugu Desam Party in Andhra Pradesh assembly elections in 1983.

Question 35.
Give details of the election laws which prohibit the candidates when they indulge in election campaign.
Answer:
According to our election laws, no party or candidate can:

  • Bribe or threaten the voters.
  • Appeal to them in the name of caste or religion etc.
  • Use government resources for election campaign.
  • Spend more than Rs. 25 Lakh for a Lok Sabha election or Rs. 10 Lakhs in an assembly election.

If they do so/their election can be rejected by court even after they have been declared elected. Minimum conditions of a Democratic Elections First, everyone should be able to choose; Everyone can vote and every vote should have equal value. Second, there should be something to choose from. Parties and candidates should be free to contest elections and should offer some real choice to the voters.

Third, the voice should be offered at regular intervals. Elections must be held regularly after every few years.
Fourth, the candidate preferred by the people should get elected. Fifth, elections should be conducted in a free and fair manner where people can choose as they really wish.

Question 36.
Mention the details about a model code of conduct for the election campaign as agreed by all the political parties in India.
Answer:
The following sum up the Model Code of conduct for the election campaign:

  • Any place of worship shall not be used for election propaganda.
  • Criticisms of the opponents shall be limited to their policies, programmes, past records and work and will not mention their personal lives.
  • No flags, banners, notices, slogans shall be placed on any building without the permission of the owner.
  • The government transport including official aircrafts, vehicles, machinery and personnel shall not be used by ministers and the ruling party.
  • The ministers shall not lay foundation stones of any projects or make any promises of providing public facilities after elections have been announced.

Question 37.
Explain Universal Adult Franchise.
Answer:
The Universal Adult Franchise ‘ refers to the enjoyment of right to vote by all the adult citizens of the county, without any discrimination i.e., on the basis of caste, creed, colour, sex, education and place of birth. It is a well-known fact that every citizen of India who is 18 years of age and above and who is not otherwise disqualified, is entitled to vote in the elections.

Question 38.
“It is said elections are the barometers of Democracy”. What do you understand by this sentence?
Answer:
In a democratic form of government, tiie elections are considered as barometers of democracy because the elections are very crucial in democratic setup. Elections provide opportunity to the people to judge the performance of the representatives. Elections also generate a new political attitude which can determine the future course of the country at. large.

Question 39.
Write a short note on the Election Commission.
Answer:
The election commission is the highest body in our country to conduct the elections. It not only conducts tire elections but also controls and even supervises this process. All elections to the parliament and to the state legislatures and elections to the offices of the President and the Vice President are conducted by the Election commission. It is the Election Commission which fixes and announces the dates of the elections in our country. The Election Commission also makes sure that the party in power does not take undue advantage over other parties.

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Question 40.
What is meant by Election Petition?
Answer:
When a candidate is not satisfied about the way the elections have been held in his constituency, he Can file a petition in the court and question the election of another candidate. This kind of petition is called an election petition. Being accepted, this kind of petition leads to a by-election to that particular seat.

Question 41.
What is the importance of the electoral symbols?
Or
Why that different political parties are given different electoral symbols?
Answer:
All the political parties, as well as the independent candidates, also are allotted symbols by the Election Commission. All the major well-Renown political parties have been allotted permanent symbols. These symbols are well-known and quite popular among the public An Indian can easily recognize a Congress candidate by the symbol of palm as well a BJP candidate by the lotus.

Election symbols are allotted mainly, because of the following reasons :

  • These symbols help the ordinary man and even an illiterate to recognise the parties.
  • These symbols help the. political parties to arrange their processions and meetings and carry on their propaganda from street to street.
  • Symbols also help in the situation when there are more than one candidate of the same name in the same constituency
  • In fact symbols make it easy to caste one’s vote.

Question 42.
State briefly the importance of regular electoral competitions.
Answer:
Regular electoral competition provides incentives to political parties and leaders. They know that if they do good work that would make them popular and increase their chances of victory in the next elections. But if, they fail to satisfy the voters with their work they will not be able ta win again. So, if a political party or leader was motivated only by desire to be in power and to continue to be so, even then they would be forced to serve the people.

This is a bit like market. Even if a shopkeeper is interested, only in his profit, he is forced to give good service to the customers, If he does not, the customer will go to some other shop. Similarly, political competition may cause divisions and some ugliness, but it finally, helps to force political parties and leaders to serve the people.

Question 43.
How is this election process complete in a country?
Answer:
The following steps are the major ones in the election process in our country :

  • Elections are announced together with their dates for purposes such as of nomination filling ‘forms, scrutiny etc.,
  • The Election Commission makes sure that the political party in power does not take any undue advantage over other parties.
  • The candidates fill up the nomination papers.
  • The nomination papers or the applications are scrutinized.
  • The candidates not willing to contest any more withdraw their candidature.
  • The final list of the candidates is published. ,
  • Campaigning done by the candidates and their supporters.
  • On the day of the election, casting of votes is performed in a free and fair atmosphere.
  • After the counting, results are announced.
    Thus, the election procedure in Our country is completed.

Question 44.
Prepare a brief list of the minimum conditions of any democratic elections.
Answer:
The following is the list of minimum conditions in any democratic elections :

  • First, everyone should be able to choose. This means that everyone should have one vote and every vote should have equal value.
  • Second, there should be something to chose from/Parties and candidates should be free to contest elections and should offer some real choice to the voters.
  • Third; the choice should be offered at regular intervals. Elections must be held regularly after every few years,
  • Fourth, whoever people choose should get elected. Elections should be conducted in a free and fair manner where people can choose as they really wish.

Question 45.
Give a brief account of election campaign.
Answer:
The main purpose of election is to give people a chance to choose the representatives, the government and’ the policies they prefer. Therefore, it is necessary to have a free and.open discussion about who is a better representative, which party will give a better government or what.is a good policy. This is what happens during election campaign. In our country, there are two weeks between the declaration of candidates and the polling of votes.

During this period the candidates contact their voters, political leaders address election meetings and political parties mobilise their supporters. This is also, the period when newspapers and television news are full of election related stories and debates. But election campaign is not limited to the two weeks only. Political parties start preparing for election, months before the election actually takes place.

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Question 46.
State briefly some challenges to free and fair election.
Answer:
There are always challenges to free and fair election. Some of these are:

  1. Candidates and parties with a lot of money may not be sure of their victory, but they do enjoy a big and unfair advantage over others.
  2. In some parts of the country, candidates with criminal connection have been able to push others out of electoral race and secure ‘tickets from more parties;
  3. Very often elections offer little choice to ordinary citizens, for both the major parties are similar to each other and do not wish to raise any major issue;
  4. Smaller parties and independent candidates suffer a huge disadvantage compared to bigger parties; and
  5. Election campaign often does not raise any basic questions and therefore does not offer any real voice to the people.

Question 47.
What is the importance of the independent Election Commission? How does such a commission help ensure free and fair elections?
Answer:
In our country, elections are conducted by an independent and very powerful Election Commission. A Commission enjoys the same kind of independence that the judiciary enjoys. The Chief Election Commissioner (CEC) is appointed by the President of India. But once appointed the Chief Election Commissioner is not answerable to the President or the government. Even if the ruling party or the government does not like what the Commission does, it is virtually impossible for it to remove the CEC.

The Election Commission is a very powerful body:

  • Our Constitution gives it tire power to take decision on every aspect of conduct and control of elections from the declaration of elections to the declaration of results;
  • The Commission lias the power to implement the Code of Conduct and punish any a candidates or party that violates it;
  • During the period of the elections, the EC can order, the government to follow some guidelines, including transferring some government officials like the Collector or SP; and
  • When government officers work on election duty, they are under the control of the EC and not the government.

Question 48.
Why are certain constituencies reserved and for whom?
Answer:
There are some constituencies which are reserved for people who belong to the Scheduled Castes [SC] and Scheduled Tribes (ST). In reserved (SC) constituency, only someone who belongs to the Scheduled Caste can stand for election. Similarly, only those belonging to Scheduled Tribe can contest. election from a reserved (ST) constituency.

The number of seats so reserved is in proportion to their population. Currently, in the Lok Sabha, 79 seats are reserved for the Scheduled Castes and 41 for the Scheduled Tribes. In the panchayat and Nagar Palika elections, one-third of the seats are reserved in a similar manner for women candidates. In many states, seats in panchayat and Nagar Palika are reserved for Other Backward Classes as well. This varies from state to state.

Why do we have this system? Isn’t this system unfair to those from other communities? It might seem so. But the gains of this system are much bigger. This system makes our democracy a representative democracy. If there were no system of reservation, very few persons from the Scheduled Castes and Scheduled Tribes would have been elected to the Lok Sabha and Vidhan Sabhas. They would not have had the resources. the education and conditions to contest elections against others.

They would have been discriminated against by others and prevented from winning elections. If that had happened, our parliament and assemblies would have been deprived of the voice of a significant section of our population. In any case the reserved seats do not take away the legitimate share of anyone else. The proportion of seats reserved for Scheduled Castes and Tribes is exactly in proportion to their share in population. In fact, inspired by the success of this system, women’s movement has been demanding a similar system for women as well.

Question 49.
Give a list of slogan raised during elections.
Answer:
In election campagins, political parties try to focus public attention on some big issues. They want to attract the public to that issue and get them to vote for their party on that basis. Let us look at some oi the successful slogans givne by different political parties in various elections.

The Congress party led by Indira Gandhi gave the slogan of Garibi Hatao (Remove poverty) in the Lok Sabha elections of 1971. The party promised to reorient all the policies of the government to remove. poverty from the country. Save Democracy was the slogan given by Janata Party in the next Lok Sabha election held in 1977.

The party promised to undo the excesses committed during Emergency and restore civil liberties. The Left Front used the slogan of Land to the Tiller in the West Bengal Assembly elections held in 1977.
Protect the Self-Respect of the Telugus was the slogan used by N. T. Rama Rao, the leader of the Telugu Desam Party in Andhra Pradesh Assembly elections in 1983.

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

Objective Type Questions

1. Put (✓) before the correct sentences and (✗) before the incorrect sentences:

(i) The election in our country is conducted by secret ballot.
Answer:
(✓)

(ii) The candidates are given a date for withdrawal of their names.
Answer:
(✓)

(iii) Elections are the barometers of democracy.
Answer:
(✓)

(iv) Radio is a medium of the expression of the public opinion.
Answer:
(✓)

(v) Correct reporting is dependent on the freedom of the press.
Answer:
(✓)

(vi) No one can predict the result of an election.
Answer:
(✓)

(vii) The influence of the opposition parties spread over the whole country.
Answer:
(✗)

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

2. Complete the following sentences

(i). In 1998, general -elections, ………………………….. formed the government at the centre.
Answer:
Coalition

(ii) A single party getting the majority or ………………………….. of parties form the government.
Answer:
Group

(iii) ………………………….. is the electoral symbol of the Congress.
Answer:
Hand

(iv) The candidates are given a ………………………….. for withdrawal of their names.
Answer:
Date

(v) Election ………………………….. carry party’s promises about major issues.
Answer:
Manifestoes

(vi) In the general elections of …………………………..the Congress party was defeated for the first time.
Answer:
1977

Class 9 Civics Chapter 4 Extra Questions and Answers Electoral Politics

3. Choose the Correct-answer from the alternatives given below:

(i) The following type of Samiti Devi Lai had formed in 1987:
(a) Nyaya
(b) Sanghparash
(c) Vidhan
(d) Sewa
Answer:
(b) Sanghparash

(ii) The Devi Lai Lok Dal party obtained the following number of seats in the Haryana Vidhan Sabha:
(a) 50
(b) 55
(c) 60
(d) 65
Answer:
(c) 60

(iii) The current Lok Sabha strength is:
(a) 540
(b) 541
(c) 542
(d) 543
Answer:
(d) 543

(iv) Currently, the number of the Scheduled Castes seats in the Lok Sabha are:
(a) 76
(b) 77
(c) 78
(d) 79
Answer:
(d) 79

(v) Currently, the number of the Scheduled Tribes in the Lok Sabha is
(a) 41
(b) 42
(c) 43
(d) 44
Answer:
(a) 41.

Extra Questions for Class 9 Social Science

Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine

Online Education Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine

Check the below Online Education NCERT MCQ Questions for Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine Pdf free download. https://ncertmcq.com/extra-questions-for-class-7-social-science/

Online Education for Devotional Paths to the Divine Class 7 Extra Questions History Chapter 8

Class 7 History Chapter 8 Extra Questions Question 1.
What did Buddha teach?
Answer:
Buddha taught that it was possible to overcome social differences and break the cycle of rebirth through personal effort.

Class 7 History Chapter 8 Extra Questions And Answers Question 2.
What was the source of idea of Bhakti?
Answer:
The idea of Bhakti (devotion) was advocated in the Bhagavadgita.

Devotional Paths To The Divine Class 7 Extra Questions Question 3.
Who were Alvars and Nayanars?
Answer:
The saints devoted to Shiva and Vishnu were Nayanars and Alvars, respectively.

Chapter 8 History Class 7 Extra Questions Question 4.
Who was Tulsidas?
Answer:
Tulsidas was famous bhakti saint of north India. He composed Ramcharitmanas in Awadhi, the story of Lord Rama.

Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine

Devotional Paths To The Divine Class 7 Questions And Answers Question 5.
Who was Surdas?
Answer:
Surdas was an ardent devotee of Krishna. His compositions, compiled in the Sursagara, Sura Saravali and Sahitya Lahari, express his devotion.

Class 7 History Ch 8 Extra Questions Question 6.
Where can we find the Sakhis and pads of Kabir?
Answer:
Some Sakhis and pads of Kabir can be found in the Guru Granth Sahib, Panch Vani and Bijak.

Ncert Class 7 History Chapter 8 Extra Questions Question 7.
What is the philosophy of Advaita?
Answer:
Advaita is the doctrine of the oneness of the individual soul and the Supreme God which is the ultimate reality.

Ncert Solutions For Class 7 History Chapter 8 Extra Questions Question 8.
How did Nayanars and Alvars spread their teachings?
Answer:
The Nayanars and Alvars went from place to place, composing exquisite poems in praise of the deities enshrined in the villages they visited and set them to music.

Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine

Extra Questions For Class 7 History Chapter 8 Question 9.
What is the philosophy of Vishishtadvaita?
Answer:
Vishishtadvaita is the doctrine of qualified oneness, in which the soul even when united with the Supreme God, remained distinct.

Class 7 History Devotional Paths To The Divine Extra Questions Question 10.
Name some bhakti saints of Maharashtra.
Answer:
The important bhakti saints of Maharashtra were Janeshwar, Namdev, Eknath, Tukaram, Sukkubai and family of Chokhamela.

Class 7 Chapter 8 History Extra Questions Question 11.
Name some famous Sufi saints of Chishti order.
Answer:
The Sufi saints of Chishti order were – Khwaja Muinuddin Chishti of Ajmer, Qutbuddin Bakhtiar Kaki of Delhi, Baba Farid of Punjab, Khwaja Nizamuddin Auliya of Delhi and Bandanawaz Gisudaraz of Gulbarga.

Class 7th History Chapter 8 Extra Questions Question 12.
What did Shankaradeva of Assam do?
Answer:
He was a devotee to Vishnu. He composed poems and plays in Assamese. He began the practice of getting up namghars or houses of recitation and prayers.

Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine

Ch 8 History Class 7 Extra Questions Question 13.
Reaction to which religious ideas culminated in the Bhakti movement?
Answer:
The reaction to the following ideas culminated in the Bhakti movement :

  • The cycle of birth, death and rebirth.
  • The inequality of all human beings, not equal even at birth.
  • Social privileges for high castes, etc.

History Class 7 Chapter 8 Extra Questions Question 14.
Describe beliefs and teachings of Shankara.
Answer:

  • Shankara advocated the doctrine of Advaita.
  • He taught that Brahman, the only or ultimate reality, was formless and without any attribute.
  • He considered the world around us to be an illusion or may a.
  • He preached renunciation of the world and adoption of the path of knowledge to understand the true nature of Brahman and attain Salvation.

Class 7 History Chapter 8 Questions And Answers Question 15.
Discuss Ramanuja’s philosophy.
Answer:

  • According to him, one can attain Salvation through intense devotion to Vishnu.
  • He propounded the doctrine of Vishishtadvaita.
  • His doctrine greatly inspired the new strand of Bhakti which developed in the north India.

Devotional Paths To The Divine Class 7 Worksheet Question 16.
What did the saints of Maharashtra do?
Answer:

  • All saints of Maharashtra rejected all forms of ritualism outward display of piety and social differences based on birth.
  • They even rejected the idea of renunciation and preferred to live with their .families.
  • They earned their livelihood like any other person, while humbly serving fellow human beings in need.
  • They insisted that Bhakti lay in sharing others’ pain.

Devotional Paths To The Divine Question Answer Question 17.
What is the uniqueness of the Bhakti saints?
Answer:

  • The unique feature of most of the Bhakti saints is that their works were composed in regional languages and could be sung.
  • They became immensely popular and were handed down orally from generation to generation.
  • Usually, the poorest and women transmitted these songs, often adding their own experiences.

Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine

Multiple Choice Questions (MCQs)

1. What was the source of idea of Bhakti or devotion?
(a) Bhagavadgita
(b) Charak Samhita
(c) Arthashastra
(d) Aryabhattam.
Answer:
(a) Bhagavadgita.

2. Which of the following Gods were worshipped by Bhaktas?
(a) Shiva
(b) Vishnu
(c) Durga
(d) All of them.
Answer:
(d) All of them.

3. Who were Alvars and Nayanars?
(a) Shiva and Parvati
(b) Vishnu and Shiva
(c) Vishnu and Laxmi
(d) Brahma and Saraswati.
Answer:
(b) Vishnu and Shiva.

Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine

4. Who wrote Ramcharitmanas in Awadhi?
(a) Kalidas
(b) Mahadevi Verma
(c) Tulsidas
(d) Valmiki.
Answer:
(c) Tulsidas.

5. Which of the following is the composition of Surdas?
(a) Sursagara
(b) Meghdutam
(c) Ramcharitmanas
(d) Rachanavali.
Answer:
(a) Sursagara.

6. Where can we find the Sakhis and pads of Kabir?
(a) Guru Granth Sahib
(b) Panch Vani
(c) Bijak
(d) All of them.
Answer:
(d) All of them.

7. Who succeeded Guru Nanak?
(a) Guru Gobind Singh
(b) Guru Angad
(c) Guru Ramdas
(d) Guru Harkishan.
Answer:
(b) Guru Angad.

8. What is the philosophy of Advaita?
(a) The oneness of individual soul and the Supreme God.
(b) Differences in individual soul and the Supreme God.
(c) The existence of many Gods and Goddesses.
(d) It does not believe in rebirth.
Answer:
(a) The oneness of individual soul and the Supreme God.

Class 7 History Chapter 8 Extra Questions and Answers Devotional Paths to the Divine

9. Which of the following were the great Sufis of Central Asia?
(a) Ghazzali
(b) Rumi
(c) Sadi
(d) All of them.
Answer:
(d) All of them.

10. Which one of the following refers to Shariat?
(a) A Hindu marriage law.
(b) A Sufi moral law.
(c) A holy law developed by Muslim Scholars
(d) A Christian holy law.
Answer:
(c) A holy law developed by Muslim Scholars.

Important Years Or Periods:

8th century Shankara was born in Kerala.

1469 Guru Nanak was born.

1539 Guru Nanak died.

1604 Guru Arjun compiled the compositions of Guru Nanak and his three successor Gurus.

1606 Jahangir executed Guru Arjun.

1699 Guru Gobind Singh established Khalsa.

1706 Guru Gobind Singh authenticated the compilation and named it Guru Granth Sahib, the holy scripture of Sikhs.

Important Terms:

→ Hagiography: Writing of saints’ lives.

→ Hospice: House of rest for travellers, especially one kept by a religious order.

Extra Questions for Class 7 Social Science

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

Online Education for Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

Check the below Online Education NCERT MCQ Questions for Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11 Pdf free download. https://ncertmcq.com/extra-questions-for-class-7-science/

Online Education Class 7 Science Chapter 11 Extra Questions and Answers Transportation in Animals and Plants

Transportation In Plants And Animals Class 7 Extra Questions And Answers Question 1.
Name the transport medium in human beings.
Answer:
Blood.

Ncert Solutions For Class 7 Science Chapter 11 Extra Questions Question 2.
What is pulse rate?
Answer:
The number of beats per minute is called the pulse rate.

Class 7 Science Chapter 11 Extra Questions Question 3.
What is the pulse rate of a resting person?
Answer:
A resting person, usually has a pulse rate between 72 and 80 beats per minute.

Class 7 Science Chapter 11 Extra Question Answer Question 4.
Where is heart located?
Answer:
The heart is located in the chest cavity with its lower tip slightly tilted towards the left.

Transportation In Animals And Plants Class 7 Extra Questions Question 5.
What are the two upper chamber of hearts called?
Answer:
Atria.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

Transportation In Plants And Animals Class 7 Questions And Answers Question 6.
What are ventricles?
Answer:
The two lower chambers of heart are called ventricles.

Transportation In Plants And Animals Class 7 Questions And Answers Pdf Question 7.
What are the functions of arteries and veins?
Answer:
Arteries and veins are two types of blood vessels. Arteries carry oxygen-rich blood from the heart to all parts of the body. On the other hand, veins carry carbon dioxide-rich blood from all parts of the body back to the heart.

Transportation In Plants And Animals Class 7 Short Questions And Answers Question 8.
Why do arteries have thick elastic walls?
Answer:
Since the blood flow is rapid and at a high pressure, the arteries have thick elastic walls.

Transportation In Animals And Plants Extra Questions Question 9.
Pulmonary artery carries carbon dioxide-rich blood, yet is not called a vein. Why?
Answer:
Pulmonary artery carries blood from the heart to the lungs, so it is called an artery and not a vein.

Class 7 Science Ch 11 Extra Questions Question 10.
Write two functions of sweat.
Answer:

  1. Removal of waste products (excess salts).
  2. Cooling of body.

Ncert Class 7 Science Chapter 11 Extra Questions Question 11.
Write about circulation in sponges and hydra.
Answer:
Animals such as sponges and Hydra do not possess any circulatory system. The water in which they live brings food and oxygen as it enters their bodies. The water carries away waste materials and carbon dioxide as it moves out. Thus, these animals do not need a circulatory fluid like the blood.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

Chapter 11 Science Class 7 Extra Questions Question 12.
What is the role of haemoglobin?
Answer:
Haemoglobin binds with oxygen and transports it to all the parts of the body and ultimately to the cells. It will be difficult to provide oxygen efficiently to all the cells of the body without haemoglobin. So, it is vital for life.

Class 7 Transportation In Plants And Animals Extra Questions Question 13.
Draw a schematic diagram of blood circulation.
Answer:
Class 7 Transportation In Plants And Animals Extra Questions

Extra Questions For Class 7 Science Chapter 11 Question 14.
Write about excretion in aquatic and land animals.
Answer:
The way in which waste chemicals are removed from the body of the animal depends on the availability of water. Aquatic animals like fishes, excrete cell waste in gaseous form (ammonia) which directly dissolves in water. Some land animals like birds, lizards, snakes excrete a semi-solid, white coloured compound (uric acid). The major excretory product in humans is urea.

Extra Questions On Transportation In Plants And Animals Question 15.
Describe the excretion in humans.
Answer:
Kidney is the most important organ of excretion in humans. The mechanism to filter the blood is done by the blood capillaries in the kidneys. When the blood reaches the two kidneys, it contains both useful and harmful substances. The useful substances are absorbed back into the blood. The wastes dissolved in water are removed as urine.

From the kidneys, the urine goes into the urinary bladder through tube-like ureters. It is stored in the bladder and is passed out through the urinary opening at the end of a muscular tube called urethra. The kidneys, ureters, bladder and urethra form the excretory system.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

Question 16.
How is water absorbed in plants?
Answer:
Plants absorb water and minerals by the roots. The root have root hairs. The root hairs increase the surface area of the root for the absorption of water and mineral nutrients dissolved in water. The root hairs are in contact with the water present between the soil particles.
Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11 2

Question 17.
How is water transported in plants?
Answer:
Plants have pipe-like vessels to transport water and nutrients from the soil. The vessels are made of special cells, forming the vascular tissue. The vascular tissue for the transport of water and nutrients in the plant is called the xylem.

The xylem forms a continuous network of channels that connects roots to the leaves through the stem and branches and thus transports water to the entire plant. The process of osmosis and transpiration to helps in movement of water in plants.

Question 18.
What is blood? What is its function?
Answer:
Blood is a fluid which flows in blood vessels.
Functions :

  • It transport substances like digested food from the small intestine to the other parts of the body.
  • It carries oxygen from the lungs to the cells of the body and vice-versa in case for CO2.
  • It also transports waste for removal from the body.

Question 19.
Why is transport of materials necessary in a plant or in an animal? Explain.
Answer:
Transport system is necessary in plants and in animals. In plants, water and minerals are transported from roots to leaves so that they may prepare food. The prepared food is transported from leaves to all parts of the plant. If there were no transport system in plants, the leaves would not be able to prepare food and all the parts of plants would not be able to survive without food and hence plants would die.

In case of animals, oxygen and food is transported to all parts of the body due to which oxidation of food takes place there and energy is released. Also, the waste products produced in the process of respiration are transported to their respective organs so that they may be excreted. In the absence of transport system, animals including humans would not be able to get energy and get rid of waste. So. their survival would not be possible. Thus, it is clear that transport system is necessary in plants and in animals.

Question 20.
When a person suffers from chest pain, the doctor immediately takes an ECG. Visit a doctor and get information about ECG. You may even lookup an encyclopaedia or the internet.
Answer:
An electrocardiogram (ECG or EKG abbreviated from the German Elektrokardio gram) is a graphic produced by an electrocardiograph, which records the electrical activity of the heart over time. Analysis of the various waves and normal vectors of depolarization and repolarization yields important diagnostic information. It guides therapy and risk stratification fo heart patients.

It helps detect electrolyte disturbances. It allows for the detection of conduction abnormalities.
It is used as a screening tool for ischemic heart disease during a cardiac stress test. It is occasionally helpful with non-cardiac In 1856 Koflicker and Mueller discovered the electrical activity of the heart when a frog sciatic nerve/gastrocnemius preparation fell onto an isolated frog heart and both muscles contracted synchronously.

Alexander Muirhead attached wires to a feverish patient’s wrist to obtain a record of the patient’s heart at while studying for his DSc (in electricity in 1872 at St Bartholomew’s Hospital This activity as directly recorded and visualized uiri Lippniann capillary electrometer by the British physiologist John Burdon Sanderson. The first to systematically approach the heart from an electrical point-of-view was Augustus Wailer, working in St Mary’s Hospital in Paddington, London. His electrocardiograph machine consisted of a Lippmann capillary electrometer fixed to a projector. The trace from the heartbeat was projected onto a photographic plate which was itself fixed to a toy train.

This allowed a heartbeat to be recorded in real-time. In 1911 he still saw little clinical application for his work. The breakthrough came when Willem Einthoven, working in Leiden, The Netherlands, used the string galvanometer invented by him in 1901, which was much more sensitive than the capillary electrometer that Wailer used.

Einthoven assigned the letters P, Q R, S and T to the various deflections, and described the electrocardiographic features of a number of cardiovascular disorders. In 1924, he was awarded the Nobel Prize in Medicine for his discovery.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

Multiple Choice Questions

1. Pulse felt on the inner side of your left wrist is due to blood flowing in the
(i) veins
(ii) arteries
(iii) capillaries
(iv) lymph vessel.
Answer:
(ii) arteries.

2. A resting person, usually has a pulse rate between :
(i) 72 – 80 beats per minute
(ii) 80 – 90 beats per minute
(iii) 90 – 100 beats per minute
(iv) 60 – 70 beats per minute.
Answer:
(i) 72 – 80 beats per minute.

3. Which of the following contains the haemoglobin?
(i) RBC
(ii) WBC
(iii) Platelets
(iv) Plasma.
Answer:
(i) RBC.

4. Clot is formed due to :
(i) RBC
(ii) WBC
(iii) Platelets
(iv) Plasma.
Answer:
(iii) Platelets.

5. The blood cells providing immunity to us are :
(i) RBC
(ii) WBC
(iii) Platelets
(iv) none of these.
Answer:
(ii) WBC.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

6. Which of the following statements is correct?
(i) Sponges and hydra do not possess any circulatory system.
(ii) Sponges and hydra possess a circulatory system.
(iii) Sponges and hydra have blood but no circulatory system.
(iv) None of these.
Answer:
(i) Sponges and hydra do not possess any circulatory system.

7. The excreta of bird, fishes and human respectively are :
(i) uric acid, urea, ammonia
(ii) uric acid, ammonia, urea
(iii) ammonia, uric acid, urea
(iv) urea, uric acid, ammonia.
Answer:
(ii) uric acid, ammonia, urea.

8. The arrangement described is known as potato osmometer. What happens to the level of sugar solution :
(i) Decreases
(ii) Increases
(iii) Remains consistant
(iv) None of these.
Answer:
(ii) Increases.

Keywords:

→ Ammonia: A compound of nitrogen and hydrogen (NH<sub>3</sub.).

→ Artery: The blood vessels that carry oxygen-rich blood from the heart to all parts of the body is called artery.

→ Blood: Blood is the vital fluid which flows in blood vessels.

→ Blood vessels: Vessels that carry blood in our body.

→ Capillary: These are thin tubes (blood vessels) which connect tissues with arteries.

→ Circulatory system: The organs involved in transportation of substances in our body constitute the circulatory system.

→ Dialysis: The process of filtering blood through an artificial kidney is called dialysis. This is helpful for the person, whose kidneys have stopped working due to infection or injury.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

→ Excretion: The process of removal of wastes produced in the cells of the living organisms is called excretion.

→ Excretory system: The body parts involved in the excretion form the excretory system.

→ Haemoglobin: A red pigment found in blood. It helps in the transportation of oxygen.

→ Heartbeat: The walls of the chambers of the heart are made up of muscles. These muscles contract and relax rhythmically. The rhythmic contraction followed by relaxation of heart constitutes a heartbeat.

→ Kidney: The organ for filtering blood.

→ Xylem: The vascular tissue for the transport of water and nutrients in the plant is called the xylem.

→ Phloem: The vascular tissue involved in the movement of synthesized food from leaves to other parts of plant is known as phloem.

→ Plasma: The fluid part of the blood is called plasma.

→ Platelets: It is type of blood cells that is responsible for blood coagulation.

→ Pulse: The throbbing movement in blood vessels is called pulse.

→ Red blood cell: A type of cells in blood that contains haemoglobin.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

→ Root hair: The hair-like projection from the root is called root hair. It increases the surface area of the root for the absorption of water and minerals dissolved in water.

→ Stethoscope: It is an instrument used to feel the heartbeat.

→ Sweat: A mixture of water and salt that is excreted by the skin.

→ Tissue: A group of cells that perform similar work.

→ Urea: A waste product produced in the body of most terrestrial animals.

→ Ureter: Carrier vessel of urine to urinary bladder.

→ Uric acid: Birds, insects and lizards excrete uric acid in semi-solid form.

→ Urinary bladder: The bladder meant for temporary storage of urine.

→ Veins: Veins are the vessels which carry carbon dioxide-rich blood from all parts of the body back to the heart.

→ White blood cell: A type of cells in blood which fight against germs that enter our body.

Extra Questions for Class 7 Science

Sound Class 8 Extra Questions and Answers Science Chapter 13

Online Education for Sound Class 8 Extra Questions and Answers Science Chapter 13

Check the below Online Education NCERT MCQ Questions for Sound Class 8 Extra Questions and Answers Science Chapter 13 Pdf free download. https://ncertmcq.com/extra-questions-for-class-8-science/

Online Education for Class 8 Science Chapter 13 Extra Questions and Answers Sound

Sound Class 8 Questions And Answers Pdf Question 1.
Name some of the musical instruments which are simply beaten or struck to produce music.
Answer:
Such instruments are manjira, ghatam, kartal, dholak, etc.

Numericals On Sound Class 8 Icse Question 2.
What part in humans produces sound?
Answer:
It is voice box in humans, that produces sound.

Icse Class 8 Physics Sound Questions And Answers Question 3.
Can sound travel through solid also?
Answer:
Yes, the sound can travel through solids also.

Questions On Sound Class 8 Icse Question 4.
What is to and fro motion of an object called?
Answer:
The to and fro motion of an object is called vibration or oscillatory motion.

Sound Class 8 Extra Questions and Answers Science Chapter 13

Sound Question Answer Class 8 Question 7.
How is frequency of oscillation expressed?
Answer:
The frequency of oscillation is expressed in terms of hertz. Its symbol is Hz. A frequency of one Hz is one oscillation per second.

Sound Class 8 Worksheet Icse Question 8.
If an object oscillates 20 times in one second, what would be its frequency?
Answer:
As the frequency is the number of vibrations per second; so in this case, when, an object oscillates 20 times in one second, its frequency would be 20 Hz.

Sound Chapter Class 8 Pdf Questions And Answers Question 9.
Can we differentiate sounds on the basis of their amplitudes and frequencies?
Answer:
Yes, with the help of amplitude and frequency we can differentiate two sounds easily.

Sound Lesson Class 8 Questions And Answers Question 10.
Define amplitude. How is it expressed?
Answer:
The displacement of the oscillating body is the measure of the amplitude of vibration of the body. It is expressed in terms of metre (m).

Class 8 Sound Question Answer Question 11.
How is loudness of a sound determined?
Answer:
The loudness of a sound is determined by its amplitude. When the amplitude of a vibration is large, the sound produced is loud, and in case of the smaller amplitude, the sound produced is feeble.

Sound Class 8 Extra Questions and Answers Science Chapter 13

Sound Class 8 Icse Questions Question 12.
What is noise? Do you enjoy the sound produced by horns of buses and trucks? Why?
Answer:
The unpleasant sounds are called noise. We do not enjoy the sounds produced by the horns of buses and trucks because these sounds are loud and harsh and hence are unpleasant sounds.

Question Answer Of Sound Class 8 Question 13.
What are the causes of hearing impairment?
Answer:
Hearing impairment is generally the result of an ear disease, injury or degeneration of the hearing mechanism with age. The noise pollution also contributes to deafness.

Sound Class 8 Question Answer Question 14.
How can one improve hearing impairment? Is society and technology to contribute towards improving this defect?
Answer:
Technological devices for the hearing impaired have made it possible for such persons to improve their quality of hearing. Society too can do much to improve the living environment for the hearing impaired by minimising noise pollution.

Sound Chapter Class 8 Of Icse Board Question 15.
What should be done to control noise pollution?
Answer:
To control noise pollution, we must control the sources of noise at home or in the surroundings. We should also plant trees in the surroundings.

Question 16.
What is noise pollution and what are the harms due to it? Mention any two methods to limit noise pollution.
Answer:
Noise pollution: Presence of excessive or unwanted sounds in the environment is called noise pollution.
Major causes of noise pollution are sounds of vehicles, explosions including bursting of crackers, machines, loudspeakers, etc.
Harms of noise pollution :
(a) The presence of excessive noise in the surroundings causes many health-related problems like lack of sleep, hypertension, anxiety, etc.

(b) A person who is exposed to a loud sound continuously may get temporary or even permanent impairment of hearing.

Methods to control noise pollution :

  • Use of automobile horns should be minimised.
  • TV and music systems should be run at low volumes.

Sound Class 8 Extra Questions and Answers Science Chapter 13

Question 17.
What are audible and inaudible sounds? Describe.
Answer:
Audible sounds: Sounds of frequencies between 20 to 20,000 hertz.
Inaudible sounds :

  • Sounds of frequencies less than 20 hertz. Such sounds are called infrasonic.
  • Sounds of frequencies more than 20,000 hertz. Such sounds are called ultrasonic.

Question 18.
What are the uses of ultrasound?
Answer:
Uses of ultrasound :

  • The ultrasound or ultrasonic sound is used in investigating and tracking many medical problems.
  • In industries, ultrasound is used for detecting flaws and cracks in metallic and other structures.
  • Some operations, like bloodless surgery, can be done by applying this sound.

Question 19.
Write a short note on the children having impaired hearing.
Answer:
A child who has a moderately severe hearing loss and does not use a hearing aid will hear very little conversational speech because speech develops as the direct result of hearing. A child with a moderately severe hearing loss may have defective speech, minimal expressive vocabulary and inadequate language structure. So, children with impaired hearing need special care. By learning sign language such children can communicate effectively.

Question 20.
Describe the construction and working of ears with diagram.
Answer:
We hear sound through our ears. The shape of the outer part of ear is like a funnel. When sound enters in it, it travels down a canal at the end of which a thin membrane is stretched tightly. It is called the eardrum.
Sound Class 8 Extra Questions and Answers Science Chapter 13 1
Sound vibrations make the eardrums vibrate. The eardrum sends vibrations to the inner ear. From there, the signals go to the brain and we hear.

Question 21.
(a) Name the soundbox in human beings. Explain, how it works?
(b) A body vibrates 100 times in 20 seconds. Calculate the time period and frequency.
Answer:
(a) The name of the voice box is larynx. The larynx or voice box is responsible for producing sounds in humans. The voice box consists of two vocal cords. These chords are arranged in such a manner that there is a small gap between them. This small gap allows air to pass through. When we speak, air is forced into this small gap by the lungs. The vibrations in the vocal cords produce the sound.

(b) Number of vibrations = 100
Time taken = 20 s
Time taken to complete one vibration 20
= \(\frac{20}{100}\) sec =\(\frac{1}{5}\) sec = 0.2 sec
Frequency = Sound Class 8 Extra Questions and Answers Science Chapter 13 2 = 5Hz.

Sound Class 8 Extra Questions and Answers Science Chapter 13

Multiple Choice Questions (MCQs)

1. The to and fro or back and forth motion of an object is termed as
(a) Simulation
(b) Allocation
(c) Vibration
(d) Elongation.
Answer:
(c) Vibration.

2. Take a shallow frying pan. Hang it at a convenient place in such a way that it does not touch any wall. What will you feel if you strike the bottom of the pan with a stick and touch the pan gently with a finger?
(a) The bottom of the pan feels hot.
(b) The bottom of the pan feels cold.
(c) We can feel the smoothness of the surface.
(d) We can feel the vibrations.
Answer:
(d) We can feel the vibrations.

3. Take a shallow frying pan. Hang it at a convenient place in such a way that it does not touch any wall. What will you observe if you strike the bottom of the pan with a stick and hold it tightly with your hands immediately after striking?
(a) The sound stops immediately.
(b) The sound continues for ten minutes.
(c) The sound becomes louder.
(d) The sound fades out gradually.
Answer:
(d) The sound fades out gradually.

Extra Questions for Class 8 Science

Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

Online Education for Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

Check the below Online Education NCERT MCQ Questions for Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14 with Answers Pdf free download. https://ncertmcq.com/extra-questions-for-class-7-science/

Online Education for Class 7 Science Chapter 14 Extra Questions and Answers Electric Current and Its Effects

Electric Current And Its Effects Class 7 Extra Questions And Answers Question 1.
Which terminal of a cell is represented by longer line?
Answer:
Positive.

Electric Current And Its Effects Class 7 Extra Questions With Answers Question 2.
Where should be the key placed in a circuit?
Answer:
The key or switch can be placed anywhere in the circuit.

Class 7 Science Chapter 14 Extra Questions Question 3.
What is a filament?
Answer:
In the bulb, there is a thin wire, called the filament, which glows when an electric current passes through it.

Electric Current And Its Effects Class 7 Question Answer Question 4.
What is the full form of CFL?
Answer:
Compact Fluorescent Lamp.

Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

Ncert Solutions For Class 7 Science Chapter 14 Extra Questions Question 5.
What is the full form of MCB?
Answer:
Miniature Circuit Breaker.

Class 7 Electric Current And Its Effects Extra Questions Question 6.
Who discovered magnetic effect of electric current?
Answer:
Hans Christian Oersted.

Class 7 Science Chapter 14 Extra Question Answer Question 7.
What are complete and incomplete circuits?
Answer:
When the switch is in the ‘ON’ position, the circuit from the positive terminal of the battery to the negative terminal is complete. The circuit is then said to be closed and the current flows throughout the circuit instantly.

When the switch is in the ‘OFF’ position, the circuit is incomplete. It is said to be open. No current flows through any part of the circuit.

Electric Current And Its Effects Class 7 Question 8.
Why should we not touch a lighted electric bulb connected to the mains?
Answer:
We should not touch a lighted electric bulb connected to the mains because it may be very hot and our hand may get burnt badly.

Ncert Class 7 Science Chapter 14 Extra Questions Question 9.
How does a fuse work?
Answer:
Every fuse is designed to carry current up to a certain maximum limit. If the current crosses that limit, the fuse wire melts due to heating effect of current and breaks the circuit. Thus, the circuit is saved.

Electric Current And Its Effects Class 7 Questions And Answers Question 10.
What are the uses of electromagnets?
Answer:

  • The electromagnets are also used to separate magnetic material from the junk.
  • Doctors use tiny electromagnets to take out small pieces of magnetic material that have accidentally fallen in the eye.
  • Many toys also have electromagnets inside them.
  • Electromagnets are used in electric bells.

Class 7 Science Ch 14 Extra Questions Question 11.
Discuss the reason for excessive \ currents in electrical circuits.
Answer:

  • One reason for excessive currents in electrical circuits is the direct touching of wires. This may happen if the insulation on the wires has come off due to wear and tear. This may cause a short circuit.
  • Another reason for excessive current can be the connection of many devices to a single socket. This may cause overload in the circuit.

Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

Electric Current And Its Effects Extra Questions Question 12.
Write construction and working of an electric bell.
Answer:
Construction: It consists of a coil of wire wound on an iron piece. The coil acts as an electromagnet. An iron strip with a hammer at one end is kept close to the electromagnet. There is a contact screw near the iron strip.

Working: When the iron strip is in contact with the screw, the current flows through the coil which becomes an electromagnet. It, then, pulls the iron strip. In the process, the hammer at the end of the strip strikes the gong of the bell to produce a sound. However, when the electromagnet pulls the iron strip, it breaks the circuit. The current through the coil stops flowing.
Electric Current Class 7 Extra Questions
The coil is now no longer an electromagnet. It no longer attracts the iron strip. The iron strip comes back to its original position and touches the contact screw again. This completes the circuit. The current flows in the coil and the hammer strikes the gong again. This process is repeated in quick succession. The hammer strikes the gong every time the circuit is completed. This is how the bell rings.

Chapter 14 Science Class 7 Extra Questions Question 13.
When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.
Answer:
When electric current passes through a wire, it behaves like a magnet. This is the magnetic effect of the electric current. So, the compass needle which is a magnet gets deflected.

Electric Current And Its Effects Class 7 Extra Questions Question 14.
Do you know what a battetis?
Answer:
When we connect two or more cells together such that the positive terminal of one cell is connected to the negative terminal of the next cell, such a combination of cells is called a battery.

Ncert Class 7 Science Electric Current And Its Effects Extra Questions Question 15.
Zubeda made an electric circuit using a cell holder shown in Fig. 14.4, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.
Answer:
Possible defects can be:

  • bulb taken would be fuse.
  • cell taken could be exhausted.
  • in cell holder, she would have connected the same terminals of the cells.

Extra Questions On Electric Current And Its Effects Class 7 Question 16.
Set up the circuit shown in Fig. 14.17 again. Move the key to ‘ON’ position and watch carefully’ in which direction the compass needle gets deflected. Switch ‘OFF’ the current. Now keeping rest of the circuit intact, reverse the connections at the terminal of the cell. Again switch ‘on the current. Note the direction in which the needle gets deflected. Think of an explanation.
Answer:
When the connection of cell is reversed, the compass needle moves in opposite direction. This shows that the polarity of the magnet depends on the direction of flow of current.

Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

Ch 14 Science Class 7 Extra Questions Question 17.
Paheli and Boojho saw a magic trick sometime back. The magician placed an iron box on a stand. He then called Boojho and asked him to lift the box. Boojho could easily lift the box. Now the magician made a show of moving his stick around the box while muttering something. He again asked Boojho to lift the box. This time Boojho could not even move it.

The magician again muttered something and now Boojho could lift the box. The audience, including Pahei and Boojhó, were very impressed with the show and felt that the magician had some supernatural powers. However, after reading this chapter Paheli is wondering if the trick was indeed some magic or some science was involved? Car you guess what science might Involved?
Answer:
The magician arranged an electromagnet below the box. The electromagnet could be turned ‘ON’ and ‘OFF’ as when the magician signals his assistance. When the electromagnet is turned 0N’ it attracts the iron box and hence it could not be lifted.

Multiple Choice Questions

1. Which of the following is a completely closed circuit?
(i) Switch key is off.
(ii) Wire connecting battery and bulb is broken.
(iii) Simple circuit with glowing bulb.
(iv) Circuit with bulbs with broken filament.
Answer:
(iii) Simple circuit with glowing bulb.

2. In a circuit, cell is attached if:
(i) only positive terminal is attached to the circuit.
(ii) only negative terminal is attached to the circuit.
(iii) both positive and negative terminals are attached to two different wires for completing the circuit.
(iv) both positive and negative terminals are attached to a single wire.
Answer:
(iii) both positive and negative terminals are attached to two different wires for completing the circuit.

Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

3. Which of the following is an effect of electric current?
(i) Heating effect only
(ii) Magnetic effect only
(iii) Both heating and magnetic effect.
(iv) Neither heating nor magnetic effect.
Answer:
(iii) Both heating and magnetic effect.

4. When a bulb is switched ON in a circuit, which of the following happens?
(i) The bulb becomes cold.
(ii) The bulb becomes hot.
(iii) No change occurs in temperature of the bulb.
(iv) The temperature of bulb is equal to room temperature.
Answer:
(ii) The bulb becomes hot.

5. Which of the following electric appliances do not make use of heating effect of current?
(i) ilectric hejter
(ii) Electric bulb
(iii) Electric eil
(iv) Electric iron.
Answer:
(iv) Electric iron.

6. The amount of heat produced in a wire is independent of 4ts:
(i) material and length only
(ii) length and thickness only
(iii) thickness and material Only
(iv) material, length and thickness.
Answer:
(iv) material, length and thickness.

Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

7. Which material can be used for making fuses?
(1) Nichrome
(ii) Tungsten
(iii) Steel wool
(iv) Copper.
Answer:
(iii) Steel wool.

8. Excessive current due to the connection of many devices to a single socket is termed as:
(i) short circuit
(ii) overload
(iii) electric magnification
(iv) none of these.
Answer:
(ii) overload.

9. Excessive current due to direct touching of wires in an electrical circuit is termed as:
(i) short circuit
(ii) overload.
(iii) electric magnification
(iv) none of these.
Answer:
(i) short circuit.

10. Current in a circuit deflects needle of a compass. This shows effect of electric current.
(i) heating
(ii) chemical
(iii) magnetic
(iv)none of these.
Answer:
(iii) magnetic.

Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

11. The needle of a compass point in …………………………….. direction.
(i) east-west
(ii) north-south
(iii) north east-south west
(iv) south east-north west.
Answer:
(ii) north-south.

12. Which of the following statements is true for electromagnets?
(i) Electromagnets are permanently magnetised.
(ii) Electromagnets lose magnetism when electric current is switched off.
(iii) They are used to magnetise other magnetically active substances.
(iv) None of these.
Answer:
(ii) Electromagnets lose magnetism when electric current is switched off.

13. Which of the following appliances uses magnetic effect of current?
(i) Electric heater
(ii) Electrician
(iii) Electric bell
(iv) Electric bull
Answer:
(iii) Electric bell.

Keywords:

→ Battery: A battery is a combination of two or more cells, such that the positive terminal of one cell is connected to the negative terminal of the next cell.

→ Electric components: Electrical devices used in a circuit are called electric components.

→ Circuit diagrams: Symbolic representation of an electric circuit.

→ Electric bell: An electrical device that produces sound when its switch is turned on.

→ Electromagnet: A coil that behaves like a magnet when electric current flows through it. is called an electromagnet. When the electric current is switched off, the coil generally loses its magnetism. Such coils are called electromagnets.

Electric Current and Its Effects Class 7 Extra Questions and Answers Science Chapter 14

→ Fuse: It is a safety device used in an electric circuit to avoid abrupt electric flow.

→ Heating effect: The wire gets hot when an electric current passes through it. This is the heating effect of the electric current.

→ Magnetic effect: When electric current passes through a wire, it behaves like a magnet. This is called the magnetic effect of the electric current.

Extra Questions for Class 7 Science