Category: CBSE Class 6

Here we are providing Class 6 History Chapter 2 Extra Questions and Answers On The Trail of the Earliest People was designed by subject expert teachers. https://ncertmcq.com/extra-questions-for-class-6-social-science/

On The Trail of the Earliest People Class 6 Extra Questions History Chapter 2

Class 6 History Chapter 2 Extra Questions And Answers Question 1.
Who are hunter-gatherers?
Answer:
‘Hunter-gatherers’ is the name which comes from the way people collected food Generally they hunted wild animals, caught fish and birds, gathered fruits roots, nuts, seeds etc.

Class 6 History Chapter 2 Questions And Answers Question 2.
Why was it difficult to hunt animals and collect plant produce?
Answer:
It was difficult to hunt animals because several animals ran faster and many were stronger. To hunt animals, or catch fish and birds, people had to be alert, quick and act quickly. To collect plant produce one had to find out which plants were edible or not, as plants could be poisonous. ‘ They had to find the season when fruits would ripen.

Class 6 History Chapter 2 Short Questions And Answers Question 3.
List the skills and knowledge children of these communities had.
Answer:
Children of these communities may have seen their parents going for hunting and collecting plant produce. So they became skilful hunters when they grew up. Girls may have seen their mothers selecting some plants and throwing away the others. They also acquired the knowledge of selection.

Ncert Class 6 History Chapter 2 Extra Questions Question 4.
How do we come to know about these early people?
Answer:
Archaeologists have found some of the tilings used by hunter-gatherers. They may have made tools of stone, wood and bone stone tools could easily survive.

Ncert Solutions For Class 6 History Chapter 2 Extra Questions Question 5.
How did the hunter-gatherer used the stone tools?
Answer:
Some of the stone tools were used to

• cut meat and bone
• scrap bark from trees And hides
• chop fruits and roots.
• Some may have been attached to handles to make spears and arrows for hunting arrows.
• Chop wood which was used as firewood.
• Wood was also used to make huts and tools.
• lagging the ground to collect edible roots.
• Stitching clothes made of animal skin.

On The Trail Of The Earliest Peoples Extra Questions Question 6.
Where did the hunter-gatherers choose to live?
Answer:
Hunter-gatherers may Stave chosen the place to live

• which was near the source of water, such as rivers and lakes.
• places where good quality stone was easily available.

History Chapter 2 Class 6 Extra Questions Question 7.
What does the term ‘Palaeolithic’ mean? How do we use this term?
Answer:
The term Palaeolithic comes from two Greek words ‘paleo meaning old and ‘lithos meaning stone. The Palaeolithic period extends from 2 million years ago to about 12000 years ago. This long span of time covers 99 pc. of human history. This long stretch of time is divided into lower, middle and upper Palaeolithic.

Class 6 History Chapter 2 Extra Questions And Answers Pdf Question 8.
Which, period is called Mesolithic period? What are the things found which belong to this period?
Answer:
The period, when environmental changes took place, beginning from about 12000 years ago till about 10000 years ago is called Mesolithic (middle stone). Stone tools found during this period are generally tiny and are called microliths. Microliths were struck onto handles of bones or wood to make tools such as saws and sickles. At the same time, older varieties of tools continued to be in use.

History Class 6 Chapter 2 Extra Questions Question 9.
Give four reasons why hunter-gatherers moved from place to place.
Answer:
me hunter-gatherers moved from place to place

1. First, if they had stayed at one place for a long time, they would have eaten up all the available plants and animal resources. Therefore, they would have had to go elsewhere in search of food.
2. Animals move from place to place-either in search of smalt prey or in case of deer and wild cattle, in search of grass and leaves. Thu is why tlie hunters had to follow the animals.
3. Third plants and trees bear fruit in different seasons so people may have moved from season to season in search of different kinds of plants.
4. People, animals and plants peed water to survive. Water is found in lakes, streams and rivers. While many lakes and rivers get water throughout the year, others are seasonal. People living on their banks would have had to go in search of water during the dry seasons (summer and winter).

Extra Questions For Class 6 History Chapter 2 Question 10.
How were stone tools made by the people?
Answer:
There were two techniques to make tools. They are :

1. The first is called stone on stone. Here the pebble from which the tool was to be made (also called the core) was held in one hand. Another stone which was used as a hammer was held in the other hand. The second stone was used to strike off flakes from the first, till the required shape was obtained.
2. Pressure Flaking: Here the core was placed on a firm surface. The hammer stone was used on a piece of stone or bone that was placed on the core, to remove flakes that could be shaped into tools.

Multiple Choice Questions

1. Which one of the following refers to rock paintings?
(a) The paintings on the walls of the caves in which the early people lived.
(b) The paintings found on certain hills.
(c) The paintings on the sand along the banks of the rivers.
(d) The paintings on the trees.
Answer:
(a) The paintings on the walls of the caves in which the early people lived.

2. Why was gathering plant produce an important means of obtaining food in Indian sub-continent?
(a) There were immense variety of plants in a tropical land like Indian sub-continent.
(b) It was easy to gather plant produce.
(c) It was very tasty.
(d) The forests were free of dangerous animals.
Answer:
(a) There were immense variety of plants in a tropical land like Indian sub-continent.

3. Who were hunter-gatherers?
(a) Those who grew’ crops
(b) Those who hunted elephants
(c) Those who hunted wild animals and gathered fruits and roots.
(d) Those who travelled from one place to another.
Answer:
(c) Those who hunted wild animals and gathered fruits and roots.

4. Which of the following difficulties were associated with hunting of animals?
(a) Several animals ran faster than the man
(b) Many animals were stronger than the man
(c) Both (a) and (b)
(d) Some animals were poisonous.
Answer:
(c) Both (a) and (b)

5. What were the difficulties in gathering plant produce?
(a) To find out which plants or parts of plants are edible and which are poisonous.
(b) Many dangerous animals were in the forest.
(c) Many people did not know how to climb on the tree.
(d) Many plant produce are dangerous for health.
Answer:
(a) To find out which plants or parts of plants are edible and which are poisonous.

6. What were the essential qualities to hunt animals?
(a) To be alert and quick
(b) Lots of presence of mind
(c) Both (a) and (b)
(d) Lots of money.
Answer:
(c) Both (a) and (b)

7. Which of the following were the uses of wood by early people.
(a) Firewood, huts and tools
(b) Table and chair
(c) Mary carts and furniture
(d) Mary bridges and railway lines
Answer:
(a) Firewood, huts and tools.

8. Who one of the following were Palaeolithic sites?
(a) Brrnagiri and Hallur
(b) Mehrgarh and Inamgaon
(c) Chand and Daojali
(d) Bhimbetka and Hunsgi
Answer:
(d) Bhimbetka and Hunsgi.

9. Which one of the following were Neolithic sites?
(a) Hiusgi and Kurnool caves
(b) Burzahom and Mehrgarh
(c) Inamgaon and Adichandlur
(d) Bhimbetka and Brahmri
Answer:
(b) Burzahom and Mehrgarh

10. Which one of the following were Megalithic sites?
(a) Hallur and Bhimbetka .
(b) Kurnool caves and Mehrgarh
(c) Daojali and Chirand
(d) Brahmagiri and Adichanallur.
Answer:
(d) Brahmagiri and Adichanallur.

Extra Questions for Class 6 Social Science

Here we are providing Class 6 Geography Chapter 1 Extra Questions and Answers The Earth in the Solar System was designed by subject expert teachers. https://ncertmcq.com/extra-questions-for-class-6-social-science/

The Earth in the Solar System Class 6 Extra Questions Geography Chapter 1

Class 6 Geography Chapter 1 Extra Questions And Answers Question 1.
What is Akash Ganga?
Answer:
The Milky Way is known as the Akash Ganga in India

The Earth In The Solar System Class 6 Worksheets With Answers Question 2.
What is Ursa Major?
Answer:
Saptarishi is called Ursa Major in Latin.

Class 6 Geography Chapter 1 Questions And Answers Question 3.
What is Big Bear?
Answer:
Saptarishi is called Big Bear in English.

Extra Questions For Class 6 Geography Chapter 1 Question 4.
When will you see more stars at night?
Answer:
We can see more stars on a new moon night (Amavasya).

The Earth In The Solar System Class 6 Extra Questions Question 5.
What is Milky Way?
Answer:
On a clear starry night, a white glowing path is visible across the sky. This path or band is the Milky Way galaxy.

Ncert Class 6 Geography Chapter 1 Extra Questions Question 6.
What is Saptarishi?
Answer:
In the night sky, the stars form various patterns and designs. A group of stars forming a particular pattern or design is called a constellation. Saptarishi is one such constellation (Sapt → seven, Rishi→ sages).

Geography Chapter 1 Class 6 Extra Questions Question 7.
What is North Star?
Answer:
In ancient times, people watched stars to determine the directions. The direction north is indicated by the North Star because it is seen directly above the north pole. It always remains in the same position in the sky.

Class 6 Geography Chapter 1 Short Question Answer Question 8.
What does the solar family consist of?
Answer:
The solar family includes the sun, the planets and their satellites and other heavenly bodies.

Geography Class 6 Chapter 1 Extra Questions Question 9.
Why is Venus called the Earth’s twin?
Answer:
Venus is considered as Earth’s twin because its size and shape are very much similar to that of the Earth.

Chapter 1 Geography Class 6 Extra Questions Question 10.
Why is the earth called the blue planet?
Answer:
From the space the earth appears blue because of the presence of water. Therefore, the earth is called the blue planet.

Cbse Class 6 Geography Chapter 1 Extra Questions Question 11.
Why does not the moon support life?
Answer:
The moon does it have conditions favourable for life. In the daytime, it is very hot, while at night it becomes very cold. There is no oxygen and water on the moon which are essential for life.

Class 6 Geography Chapter 1 Notes Question Answer Question 12.
What are asteroids? Name the largest asteroid.
Answer:
Apart from the planets and satellites, there are numerous tiny bodies which also revolve around the sun. These bodies are called asteroids. They are found between the orbits of Mars and Jupiter. The largest asteroid is the Ceres.

Earth In The Solar System Class 6 Extra Questions Question 13.
Give two examples of meteorites.
Answer:
Examples of minorities are :
1. In Arizona, USA.

The Earth In The Solar System Class 6 Extra Questions And Answers Question 14.
What is an orbit?
Answer:
The planets move around the sun in fixed paths called the orbits.

Class 6 Geography Chapter 1 Extra Questions Question 15.
Write a few lines about the moon.
Answer:
Our earth has only one natural satellite i.e., moon. Its diameter is only that of the earth. The moon is about 384,400 km. away from us.

Question 16.
Differentiate between a Meteor and a Meteorite.
Answer:
Meteor Meteorite A meteoroid starts to bum when it enters the earth’s atmosphere. It is then called a meteor. It causes a flash of light. A meteor, without being ” completely burnt, falls on the earth and creates a hollow which is called a meteorite.

Question 17.
Write a few lines about the sun.
Answer:
The sun is at the centre of the solar system. It is the head of the family. It is made up of extremely hot gases. It provides the gravitational pull that binds the solar system. It is also a massive storehouse of energy. The sun is about 150 million km away from the earth.

Multiple Choice Questions

1. Which one of the following terms is used for the full moon night?
(a) Amavasya
(b) Poornima
(c) Equinox
(d) Summer solstice.
Answer:
(b) Poornima

2. Which one of the following terms is used for Amavasya?
(a) Full moon
(b) Summer solstice
(c) New moon
(d) Equinox
Answer:
(c) New moon

3. Which one of the following statements is true about the celestial bodies?
(a) The sun, moon and all those objects shining in the night sky
(b) The sun and the earth that has life-supporting conditions
(c) The narrow zone of the earth surface where the atmosphere, hydrosphere and lithosphere meets
(d) Major domain of water.
Answer:
(a) The sun, moon and all those objects shining in the night sky

4. The celestial bodies are made of which one of the following objects?
(a) Water
(b) Minerals
(c) Rocks
(d) Gases.
Answer:
(d) Gases.

5. Which one of the following have their own heat and light?
(a) Earth
(b) Stars
(c) Saturn
(d) Asteroids
Answer:
(b) Stars

6. Which one of the following is a star?
(a) Neptune
(b) Saturn
(c) Sun
(d) Moon
Answer:
(c) Sun

7. Why does the sun look so big as compared to the other stars?
(a) It is very close to us
(b) It is very far from us
(c) It is extremely big
(d) It is the biggest star.
Answer:
(a) It is very close to us

8. Which one of the following names is used for the different groups of stars?
(a) Comet
(b) Asteroid
(c) Constellation
(d) Galaxy
Answer:
(c) Constellation

9. Which one of the following is a constellation?
(a) Pole star
(b) Ursa Major/Big Bear
(c) Moon
(d) Phobos
Answer:
(b) Ursa Major/Big Bear

10. Which one of the following indicates the north direction?
(a) Saptarishi
(6) Ursa Major
(c) North/Pole star
(d) Big Bear
Answer:
(c) North/Pole star.

→  Stars: The sun and the twinkling objects that we see at night are called stars.

→  Celestial bodies: All the objects that we see in the sky, the sun, moon and millions of bright objects are called the celestial bodies. They seem to be hanging from the space, which the ancients called heaven.

→ Universe : The Universe consists of stars, planets, satellites, dust or gases. Sun is a very big star. Planets do not have their own heat or light. They are lit by the light of the stars. All these heavenly bodies form the universe.

→  Galaxy: A galaxy is a huge system of stars. It has millions of stars very close to one another. There are millions of galaxies in the universe.

→ Constellation: In the night sky the stars from various patterns and designs. A group of stars forming a particular pattern or design is called a constellation.

→  Solar system: It includes the sun, the planets and their satellites and other heavenly bodies.

→ Geoid: It means earth like shape. The earth is slightly flattened at the poles.

→ Satellite: Heavenly body that revolves around a planet in the same way as planets revolve around the sun.

→ Sun: It is the centre of the solar system. It is the biggest member of the solar family and without its energy, life cannot exist on the earth.

→  Asteroids: There are numerous tiny bodies which revolve around the sun. They are found between the orbits of Mars and Jupiter. These bodies are called asteroids.

→  Meteoroids: The small pieces of rocks which revolve around the sun are called meteoroids.

Extra Questions for Class 6 Social Science

Here we are providing Class 6 Geography Chapter 5 Extra Questions and Answers Major Domains of the Earth was designed by subject expert teachers. https://ncertmcq.com/extra-questions-for-class-6-social-science/

Major Domains of the Earth Class 6 Extra Questions Geography Chapter 5

Class 6 Geography Chapter 5 Extra Questions Question 1.
Where is the world’s largest hot desert located?
Answer:
Sahara desert is the world’s largest hot desert. It is located in the continent of Africa.

Major Domains Of The Earth Class 6 Extra Questions And Answers Question 2.
Name the longest river that flows through Africa.
Answer:
The longest river that flows through Africa is the Nile.

Major Domains Of The Earth Extra Questions Question 3.
Name the research stations of India in the Antarctica.
Answer:
The research stations of India in the Antarctica are Dakshin Gangotri and Maitri.

Class 6 Geography Chapter 5 Extra Questions And Answers Question 4.
Name the plateau in India.
Answer:
The plateau in India is the Deccan plateau.

Major Domains Of The Earth Class 6 Worksheet With Answers Question 5.
Name the only planet that supports life. Why?
Answer:
The earth is the only planet that supports life because life-sustaining elements of land, water and air are present on the earth.

Chapter 5 Geography Class 6 Extra Questions Question 6.
What does the lithosphere consist of?
Answer:
The lithosphere consists of rocks on the earth’s crust and the shallow layer of soil that contains nutrients for organisms.

Ncert Class 6 Geography Chapter 5 Extra Questions Question 7.
Name the two main divisions of the earth’s surface.
Answer:
The two divisions of the earth’s surface are large land masses known as the continents and the ocean basins containing large water bodies.

Class 6 Geography Ch 5 Extra Questions Question 8.
Write a few lines about the continent of North America.
Answer:
The continent of North America lies in the Northern and Western Hemisphere. It is the third-largest continent of the world. It is surrounded by three oceans – Pacific ocean on the west, Atlantic Ocean on the east and Arctic ocean on the north.

Major Domains Of The Earth Class 6 Questions And Answers Question 9.
How are the landforms of the earth classified?
Answer:
The landforms of the earth, the mountains, plateaus and plains are classified on the basis of their elevation and slope.

Extra Questions Of Major Domains Of The Earth Question 10.
Name the highest plateau in the world, with its height.
Answer:
The Tibet plateau is the highest plateau in the world. It has a height of 4000 to 6000 metre above sea level.

Class 6 Geography Chapter 5 Major Domains Of The Earth Extra Questions Question 11.
How is the atmosphere useful for us?
Answer:
The earth is surrounded by an envelope of gas called the atmosphere. This thin blanket of air provides us with air that we breathe and protect us from the harmful effects of the sun’s rays.

Geography Class 6 Chapter 5 Extra Questions Question 12.
Describe the continent of South America.
Answer:
The continent of South America lies mostly in the Southern Hemisphere. The world’s longest mountain range, the Andes, run through the length of the continent. The largest river, the Amazon, flows through the continent. It is surrounded Pacific and Atlantic oceans.

Extra Questions For Class 6 Geography Chapter 5 Question 13.
How is hydrosphere formed?
Answer:
Hydrosphere consists of water in all its form, both on the surface and below the surface of the earth. Running water in rivers and oceans, in lakes, glaciers, underground water and vapour in atmosphere, all comprise the hydrosphere.

Multiple Choice Questions

1. Which one of the following is different from the other three, with reference to the domains of the earth?
(a) Lithosphere
(b) Troposphere
(c) Hydrosphere
(d) Atmosphere
Answer:
(b) Troposphere

2. In which one of the following domains land, water and air meet together?
(a) Hydrosphere
(b) Atmosphere
(c) Biosphere
(d) Lithosphere
Answer:
(c) Biosphere

3. Which one of the following statements is false about the lithosphere?
(a) The gaseous layer that surrounds the earth
(b) The solid portion of the earth
(c) Continents and ocean basins are two main divisions of the earth’s surface
(d) It comprises of rocks of the earth’s crust and thin layers of soil.
Answer:
(a) The gaseous layer that surrounds the earth

4. The elevation of land is measured from :
(a) the plain areas
(b) the plateau regions
(c) the sea level
(d) the valleys.
Answer:
(c) the sea level

5. Which one of the following is the highest peak of the world?
(a) Mt. Kilimanjaro
(b) Aravallis
(c) Nandadevi
(d) Mt. Everest (8848 mts)
Answer:
(d) Mt. Everest (8848 mts)

6. Which one of the following places is lying at the greatest depth?
(a) Challenger Deep
(b) Mariana Trench
(c) Java Trench
(d) Puerto Rico Trench
Answer:
(b) Mariana Trench

7. Which one of the following were the first men to climb the Mt. Everest?
(a) Edmund Hillary and Tenzing Norgay Sherpa
(b) Junko Tabei and Kalpana Chawla
(c) Sun-ita .Williams and Junko Tabei
(d) Junko Tabei hfid Bachendri Pal
Answer:
(a) Edmund Hillary and Tenzing Norgay Sherpa.

Important Definitions/Words:

→ Lithosphere: It is the solid portion of the earth.

→ Atmosphere; The air envelope that surrounds the earth is. called the atmosphere.

→ Hydrosphere: It refers to the layer of water on the surface of the earth in the form of oceans, lakes, fivers and other water bodies.

→ Biosphere: It includes all parts of the earth where living organisms exist. They are found in the narrow zone of contact of land, water and air.

→ Sea level AH the oceans of the world are connected with one another. The level of the seawater remains the same. It is called the sea level.

→ Topography: The detailed surface features of the land, e.g mountains, plateaus and plains.

→ Mountain: It is a natural elevation of the earth’s surface. It may have a broad base and a small summit,

→ Plateaus t They are elevated flatlands,

→ Plains: It is an unbroken flat or level land surface.

→ Coastal plains: The plains located along the coast of a sea or ocean.

→ Alluvial plains: The plains formed by the deposit of alluvium brought by the rivers, It is a very fertile area.

→ Waves: When wind blows on the surface of the ocean, it drags the water in its direction resulting in the formation of waves and currents.

→ Tides: Movement of ocean water also takes place owing to the gravitational force of the moon and the sun. Such movements are called tides. Normally tides occur twice a day at regular intervals.

→ Troposphere: The lowest layer of the atmosphere ia called troposphere. Most of the weather changes take place in this layer.

→ Stratosphere: This layer is ideal for flying of jet aircrafts. The ozone in this layer absorbs the harmful ultra-violet radiation from the sun.

→ Mesosphere: It extends above the stratosphere.

→ Thermosphere: It helps in wireless communication.

→ Exosphere: There is no distinct upper limit to the exosphere and it gives way to interplanetary space.

→ Global warming: The increase in the amount of carbon dioxide due to burning of fossil fuel, excessive deforestation, etc. has led to an increase in global temperatures. It is called global warming.

Extra Questions for Class 6 Social Science

Here we are providing Class 6 Geography Chapter 2 Extra Questions and Answers Globe Latitudes and Longitudes was designed by subject expert teachers. https://ncertmcq.com/extra-questions-for-class-6-social-science/

Globe Latitudes and Longitudes Class 6 Extra Questions Geography Chapter 2

Class 6 Geography Chapter 2 Extra Questions And Answers Question 1.
What are latitudes?
Answer:
They are the lines running in east-west direction and parallel to the equator.

Globe Latitudes And Longitudes Class 6 Extra Questions Question 2.
Do all the longitudes meet at the same point?
Answer:
Yes, all the lines of longitudes meet at the North pole and the South pole.

Ncert Solutions For Class 6 Geography Chapter 2 Extra Questions Question 3.
What is the Standard Meridian for India?
Answer:
Standard Meridian for India is 82\(\frac{1}{2}\). It is followed all over the country.

Class 6 Geography Chapter 2 Questions And Answers Question 4.
Name three types of globes.
Answer:
The three types of globes are

1. big globes, which are not easy to carry;
2. small pocket globes; and
3. globes like balloons which can be inflated are handy and easy to carry.

Ncert Class 6 Geography Chapter 2 Extra Questions Question 5.
How can we locate a place on the globe?
Answer:
Places on the globe are located with the help of lines of latitudes and lines of longitudes. Each line is numbered in degrees.

Extra Questions For Class 6 Geography Chapter 2 Question 6.
What are longitudes?
Answer:
They are the lines running in north-south direction and meet at the North-Pole and South Pole.

Chapter 2 Geography Class 6 Extra Questions Question 7.
How do we calculate the values of North pole and South pole?
Answer:
The angular distance of the North Pole and the South Pole from the equator is 90°. So, the latitude of the North Pole is QCTN and for the South Pole is 90°S.

Geography Chapter 2 Class 6 Extra Questions Question 8.
How do the lines of longitude help us to calculate time?
Answer:
The earth takes 24 hours to complete one rotation. This means, in 24 hours the earth completes 360°. This means that it takes 4 minutes to complete one degree. Accordingly, the earth is divided into 24 time zones. Places east of the Greenwich Meridian experience sunrise earlier than the places lying west of the Prime Meridian.

Multiple Choice Questions

1. Which one of the following is a true model of the earth?
(a) Map
(b) Grid
(c) Globe
(d) Mappa
Answer:
(c) Globe

2. Which one of the following statements is false about the globe?
(а) It is a true model of the earth
(b) It; is the flat representation of the earth surface
(c) It shows countries, continents and oceans in their correct size
(d) It can be rotated the same way as a topspin.
Answer:
(b) It is the flat representation of the earth surface.

3. Which one of the following statements truly define the equator?
(a) An imaginary line running on the globe and divides it into two equal parts.
(b) It is a needle fixed through the globe
(c) It is called the northern latitudes
(d) The northern part of the equator is termed as the Southern Hemisphere.
Answer:
(a) An imaginary line running on the globe and divides it into two equal parts.

4. The northern half of the earth is called:
(a) Southern Hemisphere
(b) North Pole
(c) South Pole
(d) Northern Hemisphere.
Answer:
(d) Northern Hemisphere.

5. Which one of the following terms is used for all parallel circles -from the equator up to the poles?
(a) Parallels of latitudes
(b) Prime Meridian
(c) Meridians of longitudes
(d) Tropic of Cancer.
Answer:
(a) Parallels of latitudes

6. Which one of the following is used to measure the latitudes?
(a) Meter
(b) Barometer
(c) Hygrometer
(d) Degree.
Answer:
(d) Degree.

7. Which one of the following is represented by the zero degree?
(a) Equator
(b) Arctic circle
(c) Antarctic circle
(d) Tropic of Cancer
Answer:
(a) Equator

8. Total number of latitudes are:
(a) 360
(b) 180
(c) 90
(d) 160.
Answer:
(b) 180.

9. Which one of the following latitudes is lying to the south of the equator?
(a) 20°N
(b) 30CN
(c) 55°S
(d) 50°N.
Answer:
(c) 55°S

10. 90° north (N) and 90° south (S) latitudes are also termed as: –
(a) The Tropic of Cancer
(b) North Pole and South Pole
(c) The Tropic of Capricorn
(d) Arctic circle.
Answer:
(b) North Pole and South Pole

11. Which one of the following latitudes is situated in the Northern Hemisphere?
(a) Antarctic circle
(b) South Pole
(c) Tropic of Cancer
(d) Tropic of Capricorn
Answer:
(c) Tropic of Cancer.

Important Definitions/Words:

→ Globe: It is a three-dimensional model of the earth.

→ Geoid: It means earth like shape.

→ Axis: It is an imaginary line passing through the earth. It is inclined at an angle of 66%

→ North Pole and South Pole: The two ends of the axis are called poles. They are two fixed points on the globe.

→ Equator: It is an imaginary line running west to east and divides the earth into two equal parts called the Northern Hemisphere and the Southern Hemisphere.

→ Longitudes: They are lines drawn on the globe by joining North Pole and South Pole, running in north-south direction are called longitudes or meridians.

→ Latitudes: The lines drawn between the two poles, in east-west direction and parallel to the equator are called lines of latitudes. They are also called ‘parallels’ because latitudes are parallel to each other. –

→ Graticule: The network of parallel lines and lines of longitudes is called graticule. It helps in finding the location of a place.

→ Torrid zone: This region lies between the Tropic of Cancer and the Tropic of Capricorn and receives the maximum amount of heat throughout the year because the sun rays fall vertically on this region.

→ Temperate zones: They lie in both the hemispheres. In the northern hemisphere, it lies between the Tropic of Cancer and the Arctic circle. In the southern hemisphere, it lies between the Tropic of Capricorn and the Antarctic circle.

→ Frigid zones: The word frigid means very cold. In the north, the Frigid zone lies between Arctic circle and the North pole. In the southern hemisphere, it lies between the Antarctic Circle and the South pole. The climate here is very cold due to the extreme slant of the sun’s rays.

→ Prime Meridian: It is the ‘0’ longitude and divides the earth into eastern and western hemispheres.

→ Rotation: The movement of the earth on its own axis from west to east is called rotation. The earth takes 24 hours to complete one rotation.

→ Local time: It is the time of a place, calculated by the position of the sun at noon at a given place.

→ Standard time: Every country fixes a central meridian, which is considered as the standard time of that country.

→ Greenwich Meridian Time: It is the meridian passing through Greenwich in London. Through an international agreement, the local time of all places is nuked to the Greenwich Meridian Time.

Extra Questions for Class 6 Social Science

Here we are providing Class 6 Geography Chapter 3 Extra Questions and Answers Motions of the Earth was designed by subject expert teachers. https://ncertmcq.com/extra-questions-for-class-6-social-science/

Motions of the Earth Class 6 Extra Questions Geography Chapter 3

Motions Of The Earth Class 6 Extra Questions Question 1.
Name the two movements of the earth.
Answer:
The two movements of the earth are Rotation and Revolution.

Class 6 Geography Chapter 3 Extra Questions And Answers Question 2.
What is the circle of illumination?
Answer:
The circle that divides the day from night is called the circle of illumination.

Class 6 Geography Chapter 3 Extra Questions Question 3.
What is an orbital plane?
Answer:
The axis of the earth, which is an imaginary line, makes an angle of 66\(\frac{1}{2}\)° with its orbital plane.

Motion Of The Earth Class 6 Extra Questions Question 4.
How are the seasons caused?
Answer:
The revolution of the earth and the inclination of the earth’s axis in a fixed direction cause season.

Geography Chapter 3 Class 6 Test Paper Question 5.
Into how many seasons is the year divided?
Answer:
A year is usually divided into four seasons-spring, summer, autumn and winter.

Ncert Class 6 Geography Chapter 3 Extra Questions Question 6.
What would happen if the earth did not rotate?
Answer:
If the earth did not rotate, the portion of the earth facing the sun would experience day always and would be hot. while the other half would remain in darkness and be freezing cold all the tone. Life would not have been possible in such extreme conditions.

Motions Of The Earth Class 6 Questions And Answers Question 7.
Why is the Australian Christmas celebrated in the summer season?
Answer:
The Christmas day is on 25 December. In December, the Tropic of Capricorn receives the direct rays of the sun and, the South Pole tilts towards it. Tims, it is summer in the Southern Hemisphere at this time. Therefore, Australia, which lies in Southern Hemisphere, has summer on the Christmas Day.

Multiple Choice Questions

1. Which one of the following terms is used for the movement of the earth on its axis?
(a) Revolution
(b) Orbit
(c) Rotation
(d) Movement.
Answer:
(c) Rotation

2. Which one of the following statements is truly defines the revolution of the earth?
(a) Movement of the earth on its own axis
(b) The movement of the earth around the sun in a fixed path
(c) The movement of the moon around the earth
(d) The movement of the dust particles in the atmosphere.
Answer:
(b) The movement of the earth around the sun in a fixed path

3. The earth is tilted at:
(a) an angle of 66\(\frac{1}{2}\)°
(b) an angle of 231/2°
(c) an angle of 60°
(d) an angle of 90°
Answer:
(a) an angle of 66\(/frac{1}{2}\)°

4. Which one of the following is the circle of illumination?
(a) The imaginary axis of the earth
(b) The circle that divides the day from night on the globe
(c) The Arctic Circle that demarcates the Frigid Zone in the Northern Hemisphere
(d) The Antarctic Circle that lies in the Southern Hemisphere.
Answer:
(b) The circle that divides the day from night on the globe

5. Which one of the following terms is used for the period of one rotation?
(a) Circle of illumination
(b) Orbital plane
(c) Earth day
(d) Revolution.
Answer:
(c) Earth day

6. How much time the earth takes to complete one revolution?
(a) 366 days
(b) 365% days
(c) 364 days
(d) 350 days
Answer:
(b) 365% days

7. Which one of the following terms is used for the year with 366 days?
(a) Spring year
(b) Autumn year
(c) Giant year
(d) Leap year
Answer:
(d) Leap year

8. The earth moves around the sun in which one of the following orbits?
(a) Elliptical
(b) Circular
(c) Irregular
(d) Regular
Answer:
(a) Elliptical

9. A year is usually divided into;
(a) Summer and winter seasons
(b) Rainy, hot and humid seasons
(c) Summer, winter, spring and autumn seasons
(d) Spring and autumn seasons.
Answer:
(c) Summer, winter, spring and autumn seasons

10. On which one of the following latitudes the sun’s rays fall directly on 21st June?
(a) Tropic of Capricorn
(b) Tropic of Cancer
(c) Arctic Circle
(d) Antarctic Circle.
Answer:
(b) Tropic of Cancer

11. During Summer Solstice, which one of the following hemispheres experiences the summer season?
(a) Northern Hemisphere
(b) Southern Hemisphere
(c) Eastern Hemisphere
(d) Western Hemisphere
Answer:
(a) Northern Hemisphere

12. Which one of the following statements is false about the Summer Solstice?
(a) It occurs on 22nd December in the Northern Hemisphere
(b) The longest day and shortest night occur in the Northern Hemisphere on 21st June
(c) The North Pole is inclined towards the sun,
(d) The Arctic Circle experiences continuous daylight for about six months
Answer:
(a) It occurs on 22nd December in the Northern Hemisphere.

Important Definitions/Words:

→ Rotation: The movement of the earth on its own axis is called rotation. It takes 24 hours to rotate once on its own axis.

→ Revolution: The movement of the earth around the sun in a fixed path is called revolution.

→ Orbital plane I The axis of the earth, which is an imaginary line, makes an angle of 66% with its plane.

→ Circle of illumination: The circle that divides the day from night is called the circle of illumination.

→ Daily motion: The rotation of the earth is called the daily motion.

→ Leap year: It is a year when the month of February has 29 days instead of 28 days.

→ Elliptical orbit: The movement of the earth around the sun does not make a complete circle. It revolves around the sun and the path is bulging in the east and west directions.

→ Summer Solstice: It is the position of the earth when the Northern Hemisphere has the longest day and the shortest night. It occurs on 21st June. In the Southern Hemisphere, it is winter season at this time. The days are short and the nights are long.

→Winter Solstice: It is the position of the earth when Southern Hemisphere has long days and shorter nights. In the Northern Hemisphere, the days are short and the nights are long. It occurs on 22nd December.

→ Spring and Autumn Equinoxes: The Northern Hemisphere gets spring on 21st March and Autumn on 23rd September. Exactly the opposite happens in the Southern Hemisphere, where it is spring on Sept. 23rd and Autumn on March 21st. These positions are called Spring and Autumn Equinoxes respectively.

Extra Questions for Class 6 Social Science

In this page, we are providing Light Shadows and Reflection Class 6 Extra Questions and Answers Science Chapter 11 pdf download. NCERT Extra Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers will help to score more marks in your CBSE Board Exams. https://ncertmcq.com/extra-questions-for-class-6-science/

Class 6 Science Chapter 11 Extra Questions and Answers Light Shadows and Reflection

Extra Questions for Class 6 Science Chapter 11 Light Shadows and Reflection with Answers Solutions

Light Shadows and Reflection of Distances Class 6 Extra Questions Very Short Answer Type

Light Shadow And Reflection Class 6 Question 1.
What is light?
Answer:
Light is a form of energy which enables us to see.

Class 6 Science Chapter 11 Extra Questions Question 2.
What is a luminous object?
Answer:
An object having its own light is called a luminous object, e.g., torch, sun, etc.

Light Shadow And Reflection Class 6 Questions And Answers Question 3.
What is a non-luminous body?
Answer:
An object which does not have its own light is called a non-luminous object, e.g., chair, moon, etc.

Light Shadow And Reflection Class 6 Extra Questions And Answers Question 4.
Name some luminous objects.
Answer:
Torch, bulb, sun, firefly and a burning candle.

Ncert Class 6 Science Chapter 11 Extra Questions Question 5.
Give four examples of non-luminous objects.
Answer:
Table, chair, blackboard and notebook.

Class 6 Science Ch 11 Extra Questions Question 6.
Name four natural luminous bodies.
Answer:
The sun, firefly, stars and fire.

Light Shadow And Reflection Question Answer Question 7.
Name some artificial source of light.
Answer:
Candle, bulb, kerosene oil, lamp and torch.

Question And Answer On Light Shadow And Reflection Class 6 Question 8.
What is a transparent object?
Answer:
An object which allow light to pass through it, is called transparent object, e.g., clear glass, water, etc.

Class 6 Light Shadow And Reflection Question 9.
What is a translucent object?
Answer:
An object which allows only a small part of light through it, is called translucent object, e.g., wax paper, fog, etc.

Light Shadow And Reflection Class 6 Extra Questions Question 10.
What is an opaque object?
Answer:
An object which does not allow light at all to pass through it, is called opaque object, e.g., wooden sheet, wall, etc.

Class 6 Light Shadow And Reflection Extra Questions Question 11.
Give four examples of transparent objects.
Answer:
Clear glass, clean water, cellophane paper and air.

Chapter 11 Class 6 Science Extra Questions Question 12.
Give four examples of translucent object.
Answer:
Frosted glass, wax paper, greased paper and butter paper.

Light Shadows And Reflection Class 6 Important Questions Question 13.
Give four examples of opaque objects.
Answer:
Wood, metals, clay and black paper.

Questions On Light Shadow And Reflection For Class 6 Question 14.
What is a shadow?
Answer:
The dark patch formed due to obstruction of light rays by an opaque object is called a shadow.

Class 6 Chapter 11 Science Extra Questions Question 15.
What information does a shadow give about an object?
Answer:
A shadow gives information about the shape of the object.

Question 16.
Does the colour of the object affect the colour of the shadow?
Answer:
No, the colour of the object does not affect the colour of the shadow.

Question 17.
When is a shadow formed?
Answer:
A shadow is formed when an opaque object is placed in the path of light.

Question 18.
Define a pinhole camera.
Answer:
A pinhole camera is a device which forms a photograph like image of a bright object on a screen.

Question 19.
On which property of light a pinhole camera does work?
Answer:
Rectilinear propagation of light.

Question 20.
How does light travel?
Answer:
Light travels in a straight line.

Question 21.
What type of images are formed by a pinhole camera?
Answer:
The images formed by a pinhole camera are upside down, i.e., inverted image.

Question 22.
What is mirror?
Answer:
A smooth, polished reflecting surface is called a mirror.

Question 23.
What type of image is formed by a plane mirror?
Answer:
Erect and laterally inverted image is formed by a plane mirror.

Question 24.
What is the size of the image formed by a plane mirror?
Answer:
The size of the image formed by a plane mirror is same as that of the object.

Question 25.
What is the colour of the image formed by a plane mirror?
Answer:
The colour of the image formed by a plane mirror is same as that of the object.

Question 26.
What is an eclipse?
Answer:
The phenomenon of formation of shadows of celestial bodies on one another is called an eclipse.

Question 27.
What is rectilinear propagation of light?
Answer:
The property due to which light travels in a straight line is called rectilinear propagation of light.

Question 28.
What is reflection?
Answer:
the phenomenon of bouncing back of light by a highly polished surface is called reflection.

Question 29.
What is an incident ray?
Answer:
The ray of light falling on the surface of the mirror is called an incident ray.

Question 30.
What is reflected ray?
Answer:
The ray of light returning back from the mirror is called a reflected ray.

Light Shadows and Reflection of Distances Class 6 Extra Questions Short Answer Type

Question 1.
What is light?
Answer:
Light is a form of energy which when falls on the object enables us to see them. It helps us to see the objects from which it comes or from which it is reflected.

Question 2.
Distinguish between luminous and non-luminous objects?
Answer:
The objects which have light of their own are called luminous objects such as torch, bulb, burning candle, etc., whereas non-luminous objects does not have light of their own and can be seen only when light falls on them such as table, wall, book, etc.

Question 3.
What is a shadow? How is it formed?
Answer:
The dark patch formed behind an opaque object is called a shadow. It is formed when light ray falling on the surface of the mirror (say an opaque object) is blocked by it.

Question 4.
What are the essential conditions for formation of shadows?
Answer:
A shadow is formed when

1. there is a source of light.
2. there is an opaque object in the way of light.
3. the light ray falling on the opaque object is blocked by it.

Question 5.
Moon is a non-luminous body though it glows. Justify.
Answer:
Moon does not emit light of its own. So it is a non-luminous body. It glows due to reflection of sunlight by it.

Question 6.
What is a pinhole camera? What type of images is formed by it?
Answer:
A pinhole camera is a device which forms a photographic image of a bright object on a screen. The images formed by a pinhole camera are upside down (inverted images).

Question 7.
What is mirror? What type of images is formed by it?
Answer:
The glass sheet having a polished, shiny, smooth and reflective surface on the other side is called a mirror. The images formed by a mirror are erect and laterally inverted.

Question 8.
Why should we not look at the sun directly?
Answer:
The sun radiates ultraviolet radiations that could be extremely harmful for our eyes. This is why we should never see the sun with naked eyes.

Question 9.
What is natural pinhole camera? What type of images is formed by it?
Answer:
When sunlight falls in the leaves of a tree, the gaps between the leaves act as a natural pinhole camera. Afterwards rounded shaped images are formed on the earth. These are pinhole images of the sun.

Question 10.
What is lateral inversion?
Answer:
Lateral inversion means the apparent reversal of the mirror images when compared with the object. For example, right side of the object appear as left side in the image.

Question 11.
Write two differences between a shadow and an image.
Answer:
Images are formed by intersection of reflected rays whereas a shadows are formed when light does not reach behind the object. Images gives more information about the objects such as colour, structure, etc., whereas shadows do not provide such information.

Question 12.
Why is a silvered glass used as a mirror?
Answer:
A silvered glass has a smooth surface which helps in forming clear image. Silverness makes the surface shiny which helps in reducing the absorption of light falling on the mirror surface.

Question 13.
What is an eclipse? What are the two types of eclipse?
Answer:
The formation of shadows by celestial bodies on one another is called an eclipse. There are two types of eclipse.

1. When the moon comes in between the sun and the earth, the shadow of the moon falls on the earth. This is called solar eclipse.
2. When the earth comes in between the sun and the moon, the shadow of the earth falls on the moon. This is called lunar eclipse.

Question 14.
What are incident ray and reflected ray?
Answer:
(a) A light ray falling on a smooth, shiny and polished surface (say a plane mirror) is called the incident ray.
(b) The light ray returning back in the same medium after striking a smooth, shiny and highly polished surface (say a plane mirror) is called reflected ray.

Light Shadows and Reflection of Distances Class 6 Extra Questions Long Answer Type

Question 1.
What are the different types of object based on their ability to pass the light? Give suitable examples of each objects.
Answer:
On the basis of ability to pass light through an object, objects are classified into three main groups, i.e.,
(a) transparent
(b) translucent and
(c) opaque.

(a) Transparent objects: Objects through which light can pass easily are called transparent objects, e.g., clean glass, clean water, clean air, etc.
(b) Translucent objects: Objects through which light can pass partially and through which we cannot see clearly are called translucent objects, e.g., greased paper, wax paper, butter paper, etc.
(c) Opaque objects: Objects through which light cannot pass at all and through which we cannot see are called opaque objects. Only opaque objects can make shadows, e.g., wall, blackboard, stone, etc.

Question 2.
What is a pinhole camera? How does it works? Explain its construction and image formation.
Answer:
A pinhole camera is a device which casts a photographic image of a bright object on a screen. It works on the principle that light travels in a straight line.

A pinhole camera can be made with simple materials and can be used to obtain the image of sun and brightly lit objects. It consists of a box made of metal or a cardboard that has a fine hole in one face. A plate or any translucent sheet on the side opposite to the face containing the pinhole serves as a screen.

Images formed by a pinhole camera are upside down, i.e., inverted images.

Question 3.
With the help of diagrams show solar and lunar eclipses.
Answer:

Question 4.
What is umbra and penumbra? With the help of a suitable diagram, show their formation.
Answer:
The inner region of a shadow which is completely dark is called umbra and the outer region surrounding the umbra which is a partially dark region is called penumbra. These two regions in shadows are formed when an opaque body is placed in front of an extended or slit source.

Light Shadows and Reflection of Distances Class 6 Extra Questions HOTS

Question 1.
Why shadows are black in colour?
Answer:
Shadow is formed by an object by obstructing light so that it doesn’t reach a surface. The area in shadow appears black because there is no light falling on it.

Question 2.
Why we do not obtain upside-down image of the Sun through a pinhole camera?
Answer:
Shape of the Sun is round, so when we see the sun from any angle we get a circle only.

Question 3.
We consider moon as non-luminous body but still we can see things on a full moon night. Why?
Answer:
Moon does not have light of its own. Moon reflects the light of sun in the night. On dark nights a little illumination by moon enables us to see things around us.

Question 4.
Why lunar eclipse not occur every month?
Answer:
It do not occur every month because the Earth’s orbit around the sun is not in the same plane as the moon’s orbit around the earth.

Light Shadows and Reflection of Distances Class 6 Extra Questions Value Based (VBQs)

Question 1.
Parthiv’s grandmother looked a little worried today. She asked everybody to have their lunch after 3 p.m. When Parthiv asked the reason she said, “today is solar eclipse at 2:15 p.m.” Parthiv made her relaxed and said this is a natural phenomenon and nothing bad or unpleasant things are related to this. His grandmother listen him carefully.
(a) What is solar eclipse?
(b) Why do you think that some people believe that these eclipses will have some bad effect on them?
(c) Do you experienced such superstition in your life?
(d) What value of Parthiv is shown here?

Answer:
(a) When the earth, moon and sun are in a straight line, with moon in between, the shadow of moon falls on the earth and this is known as solar eclipse.
(b) Because these type of people are superstitious and doesn’t know the scientific reason behind this.
(c) Yes, many a times by my grandmother.
(d) Parthiv is an intelligent and mature boy with scientific aptitude.

Question 2.
Soumen’s teacher asked their class to make a pinhole camera by themselves. Soumen read the activity 5 given in his textbook on how to make a pinhole camera. But he was unable to get the image of a well lit object. He was very upset. His elder brother on observing his pinhole camera found that the hole made by him was quite large. He rectified Soumen’s mistake and helped him making another pinhole camera. Now, Soumen can see the image of the object.
(a) On which principle of light does a pinhole camera works?
(b) Why was Soumen unable to get the image of a well lit object?
(c) How does the formation of the image by a pinhole camera is affected by size of the hole?
(d) What values of Soumen is shown here?

Answer:
(a) Rectilinear propagation of light
(b) He made a larger hole instead of a fine hole.
(c) The finer will be the hole the sharper will be the image formation and vice versa.
(d) Soumen got upset easily without looking and inspecting the actual cause, he is bit careless in doing his activity.

In this page, we are providing Water Class 6 Extra Questions and Answers Science Chapter 14 pdf download. NCERT Extra Questions for Class 6 Science Chapter 14 Water with Answers will help to score more marks in your CBSE Board Exams. https://ncertmcq.com/extra-questions-for-class-6-science/

Class 6 Science Chapter 14 Extra Questions and Answers Water

Extra Questions for Class 6 Science Chapter 14 Water with Answers Solutions 

Water Class 6 Extra Questions Very Short Answer Type

Water Class 6 Questions And Answers Question 1.
Can you name some activities where water is used for recreation?
Answer:
River rafting, swimming, water games, water park, etc.

Class 6 Science Chapter 14 Extra Questions Question 2.
Name some sources of water.
Answer:
Hand pump, tube well, river, pond, lake, ocean, etc.

Ncert Class 6 Science Chapter 14 Extra Questions Question 3.
From where do lakes and ponds get their water?
Answer:
Rains

Water Class 6 Worksheet With Answers Question 4.
Name two main processes which transfer water present on the earth into water vapour continuously.
Answer:
Evaporation and transpiration.

Water Class 6 Extra Questions And Answers Question 5.
What name is given to the process in which rainwater is made to percolate into the ground efficiently?
Answer:
Rainwater harvesting

Class 6 Science Water Extra Questions Question 6.
What is the ultimate source of water?
Answer:
Rain

Water Class 6 Extra Questions Question 7.
What are the different forms of precipitation?
Answer:
Rain, snow and dew.

Class 6 Water Extra Questions Question 8.
What will happen if there is a continuous rain?
Answer:
This results into floods.

Class 6 Science Ch 14 Extra Questions Question 9.
Name the process which is involved in the formation of dew?
Answer:
Condensation

Ncert Solutions For Class 6 Science Chapter 14 Extra Questions Question 10.
Name the condition given to the extreme dryness in an area due to lack of rains for a long period.
Answer:
Drought

Class 6 Science Chapter 14 Worksheet Question 11.
What is the main source of groundwater?
Answer:
Rainwater

Class 6 Science Chapter 14 Extra Question Answer Question 12.
List one use of water.
Answer:
Water is essential for the germination of seeds.

Extra Questions On Water Class 6 Question 13.
Name the term used for falling of water drops from sky.
Answer:
Precipitation

Class 6 Science Chapter 14 Questions And Answers Question 14.
Name the states where roof top water harvesting is used to collect water.
Answer:
Tamil Nadu and Rajasthan.

Water Class 6 Worksheet With Answers Pdf Question 15.
What is the process of changing water into vapour called?
Answer:
Vapourization

Water Class 6 Extra Questions Short Answer Type

Question 1.
What is glacier?
Answer:
A glacier is a persistent body of dense ice that is constantly moving under its own weight. The rivers get their water from the melting of these glaciers.

Question 2.
Why is water important for us?
Answer:

1. Water regulates body temperature by the process of respiration and evaporation.
2. All metabolic reactions in the body take place in aqueous medium.
3. It transports minerals and food materials in plant’s and animal’s body.

Question 3.
What is water cycle?
Answer:
Water constantly moves from the earth to the air and back again. The constant circulation of water is known as the water cycle.

Question 4.
What are the different ways by which water vapour is put into the atmosphere?
Answer:
Water in oceans, lakes and ponds get evaporated due to atmospheric heat. Factories and thermal power stations produce a lot of steam and put it into the atmosphere. Plants lose water through transpiration. Animals lose water through respiration, sweating and excretion. All this vapour accumulates in the atmosphere.

Question 5.
What is precipitation?
Answer:
When water drops come together in the air, it becomes heavy and begin to fall. Falling of water drops is called precipitation.

Question 6.
What are the two main techniques of rainwater harvesting?
Answer:
The two main techniques of rainwater harvesting are:

• Roof-top rainwater harvesting
• Rainwater harvesting from open spaces around buildings.

Question 7.
How does rainwater become saline?
Answer:
Water is a universal solvent because it dissolves a large number of substances. When rain falls, it dissolves common salts and many other substances and minerals present on the earth. The rainwater passes through different layers of earth, rocks, dissolves large amount of salt and other minerals. Thus it becomes salty.

Question 8.
Explain the roof-top rainwater harvesting.
Answer:
In this technique, the rainwater from the roof-top is collected in a storage tank with the help of pipes. Here it is filtered and then sent into a pit. The water in the pit seeps or percolates slowly into the ground to recharge the groundwater.

Question 9.
How does water cycle help in maintaining global climate?
Answer:
Water cycle plays an important role in the world climate. Ocean absorb vast quantities of heat and help in global warming. By absorbing heat, water evaporates and on condensation releases heat. This absorption and releasing of heat in the form of energy drives weather pattern in the short-term and regulate the climate for long time.

Water Class 6 Extra Questions Long Answer Type

Question 1.
Explain the process of water cycle in nature with the help of suitable diagram.
Answer:
Water constantly moves from the earth to the air and back again. The constant circulation of water is known as the water cycle. The water in seas, rivers, lakes, ponds or streams evaporates because of the heat of the sun. Plants also give out large amounts of water from their leaves. The water vapour rises up. The air higher up in the atmosphere is cooler.

This cools the water vapour and its condenses to form tiny drop of water. These drops of water together form clouds. As the clouds get cooled further, the water drops become bigger and heavier. When they become too heavy, they fall on the earth as rain and fill the sources of water like river, ponds, streams, etc.

Question 2.
List the uses of water.
Answer:
Uses of water are:

1. It is needed for drinking, bathing, washing, cleaning of vessels, toilets, flushing, etc.
2. Our body contains about 70% of water. Hence, water is essential for our life.
3. Water helps animals and plants to keep themselves cool.
4. Water is required for irrigation.
5. Water is used to generate electricity.
6. Water is used for recreational activity.
7. Water is habitat of many aquatic plants and animals.

Question 3.
Explain about the sources of water.
Answer:
Sources of water can be classified as:

• Surface-water: Rivers, lakes, ponds, streams, oceans, etc., are surface water which is continually replenished by rainwater runoff and melting of glaciers. Most of the human activities, like drinking, washing, farming, etc., rely on freshwater supply. Two-third of Earth’s surface is covered with oceans and seas. Water from these sources are not fit for drinking or any other human activities. Surface water act as natural habitat for many plants and animals.

• Groundwater: Water present beneath Earth’s surface in soil pore spaces and in fractures of rock formations. It is stored there and moves slowly through geologic formation of soil, sand and rocks called aquifers. Groundwater is mainly replenished through seepage of rainwater and surface water.

• Rain: Rain is liquid water in form of droplets that have condensed from the atmospheric water vapour and then precipitated, i.e., become heavy enough to fall under gravity.

• Glaciers and snow: Glacier is a persistent body of dense ice that is constantly moving under its own weight. It forms where the accumulation of snow exceeds its melting. Glacial ice is the largest reservoir of freshwater on Earth.

Question 4.
What is drought? When does drought occur?
Answer:
Drought is a long period without rains leading to severe shortage of water in the region.
The soil continues to lose water by evaporation and transpiration. The water lost by soil is usually made up by rains. If, however, it does rain at all or the rainfall is very low for a long period, the loss of water from the soil is not made up and hence the soil becomes dry.

Due to lack of rains, the water level in the lakes and ponds also goes down and some of them may even dry up completely. In the absence of rains, no water seeps into the ground and hence the level of groundwater in wells, etc., falls drastically. Due to this groundwater also becomes scarce. In this way, a prolonged period of no rains or very low rains causes all around shortage of water leading to drought.

Question 5.
How is rain useful to us?
Answer:
Rainwater is useful to us in the following ways: ,

1. Rains bring relief by cooling the environment after hot summer days.
2. The sowing of many crops depends on the arrival of rains during monsoon.
3. Rains provide water in the rivers and dams of hydroelectric power plants.
4. Rains fill the lakes and ponds which acts as source of water.
5. Rains are also responsible for recharging the groundwater and thus maintaining water table.

Water Class 6 Extra Questions HOTS

Question 1.
What are the factors affecting rate of evaporation?
Answer:
(a) Temperature: Higher is the temperature higher will be the rate of evaporation.
(b) Wind velocity: Higher is the wind velocity higher will be the rate of evaporation.
(c) Surface area: Larger is the surface area, i.e., exposed area, larger will be the rate of evaporation.
(d) Humidity: Humidity is the presence of moisture in air. Higher is the humidity, less will be the the rate of evaporation.

Question 2.
How does water kept under the shade of a tree also gets evaporated?
Answer:
Air around us gets heated from sunlight. This warm air provides heat for evaporation of water kept in
the shade.

Question 3.
What will happen if we are lost in a sea and drink lot of sea water to quench our thirst?
Answer:
The sea water is highly saline. Drinking this water will cause diarrhoea and loss of too much water from our body through frequent urination. Thus, will cause dehydration and ultimately death.

Question 4.
In what ways does water serves to sustain life?
Answer:
Water controls various biological processes like, transpiration, ingestion, excretion, digestion, etc. Moreover 70% of our body weight comprises of water.

Question 5.
Dissolve two spoons of common salt in half a cup of water. Now, if you want to get the salt back, what will you do?
Answer:
To get the salt back from its solution, the solution is heated in a container till all the water gets evaporated. The white powdery substance that is retained back is the salt

Water Class 6 Extra Questions Value Based (VBQs)

Question 1.
On a summer vacation, Ria went to her village to spent her holidays. After staying there for some days she realised the problem of shortage of water faced by the villagers. She along with her father went to the office of water supply department of her village and conveyed them the problem of water shortage.

The officer of water supply department assured Ria and her father that they will do something to overcome this shortage but the villagers must also adopt water conservation practices to use water judiciously. Ria thought to make villagers aware of water conservation practices with some interesting play so that they could understand its importance.
(a) Where did Ria went in her summer vacation?
(b) What did she observed there?
(c) What do mean by water conservation?
(d) What practices could help in conserving water?
(e) What values of Ria is shown here?

Answer:
(a) Ria went to her village in summer vacation.
(b) She observed water shortage there.
(c) Water conservation refers to strategies and activities made to manage fresh water as a sustainable resource to meet current and future human demand.
(d) (i) Use water judiciously.
(ii) Use water from washing machine, bathing and moping in watering plants or flushing toilets.
(iii) Check leaking pipes and get it’repaired.
(iv) Use high-efficiency toilets that use less water in a flush.
(v) Water the plants at night to reduce loss of water due to evaporation.
(e) Ria is an intelligent, responsible, understanding, sensible and innovative girl.

Question 2.
Whenever Sajia returns from school she empties her water bottle in the potted plant instead of throwing it in the sink. She always keep her eyes on her housemaid that the water after mopping the house must be used for watering the plants in the garden.
(a) Can you suggest any other use of the water left after mopping?
(b) What is the function of water in plants?
(c) What values of Sajia is shown here?
Answer:
(a) We can use the water after mopping in flushing the toilets.
(b) Water in plants help in transportation, maintaining turgidity, photosynthesis and cooling through transpiration.
(c) Sajia is eco-friendly, responsible and intelligent girl.

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Class 6 Science Chapter 16 Extra Questions and Answers Garbage in Garbage Out

Extra Questions for Class 6 Science Chapter 16 Garbage in Garbage Out with Answers Solutions

Garbage in Garbage Out Class 6 Extra Questions Very Short Answer Type

Class 6 Science Chapter 16 Extra Questions Question 1.
What is garbage?
Answer:
Waste materials or rubbish, specially used household wastes are called garbage.

Garbage In Garbage Out Class 6 Extra Questions Answers Question 2.
Name the manure made from kitchen wastes.
Answer:
Compost

Garbage In, Garbage Out Class 6 Worksheets With Answers Question 3.
What are the sources of waste?
Answer:
Sources of waste are domestic, agricultural and industrial.

Garbage In, Garbage Out Class 6 Extra Questions Answers Question 4.
Name some materials that can be reused.
Answer:
Plastic, metal and glass.

Class 6 Science Chapter 16 Extra Question Answer Question 5.
What type of garbage is collected in green bins?
Answer:
Biodegradable garbage like kitchen, plant and animal wastes.

Garbage In Garbage Out Extra Questions Question 6.
What is composting?
Answer:
Rotting and conversion of biodegradable materials into manure is called composting.

Garbage In Garbage Out Class 6 Worksheets With Answers Question 7.
What is waste?
Answer:
Unwanted or unusable remains or by-products of materials or food is known as waste.

Garbage In Garbage Out Class 6 Extra Questions Question 8.
Name some materials that cannot be disposed of easily.
Answer:
Plastic products, polythene, glass, etc.

Garbage In Garbage Out Class 6 Questions Answers Question 9.
What is a dustbin?
Answer:
The container in which the waste materials are collected is called a dustbin.

Ncert Class 6 Science Chapter 16 Extra Questions Question 10.
What type of waste is collected in blue bin?
Answer:
Non-biodegradable materials bke plastics, metals and glass are collected in a blue bin.

Garbage In Garbage Out Class 6 Question 11.
What is vermicomposting?
Answer:
The process of making compost with the help of redworms is called vermicomposting.

Class 6 Science Ch 16 Extra Questions Question 12.
What is recycling?
Answer:
The process of recovery and reprocessing of some materials to get new products is called recycling.

Garbage In Garbage Out Question Answer Question 13.
How waste are classified on the basis of degradability?
Answer:
Biodegradable and non-biodegradable.

Garbage In Garbage Out Class 6 Questions And Answers Question 14.
What type of waste is generated from agricultural activities?
Answer:
Husk, bags, fertilizers, rotted plant products, livestock waste, etc.

Garbage in Garbage Out Class 6 Extra Questions Short Answer Type

Question 1.
What are the two main types of wastes based on their degradability?
Answer:
There are mainly two types of wastes:

• Biodegradable wastes, such as kitchen and other plant and animal wastes, which can be degraded by the action of organisms.
• Non-biodegradable wastes, like plastics, metals and glass, which cannot be degraded by the organisms.

Question 2.
How many types of bins are provided by the government for collecting garbage?
Answer:
The government provides two types of bins for collecting garbage. They are:

• Blue bins: It is to collect non-biodegradable wastes like plastic, metal and glass wastes.
• Green bins: It is to collect biodegradable wastes like vegetable and fruit peels, tea leaves, etc.

Question 3.
What is vermicomposting? How is vermicompost useful as compared to chemical fertilizer?
Answer:
The process of making compost with the help of redworms is called vermicomposting. Vermicompost is less expensive, high yielding crops and beneficial for soil health as compared to chemical fertilizers.

Question 4.
Why should we not use wastes that may contain salt, pickles, oil, vinegar and milk preparations as food for redworms in vermicomposting pit?
Answer:
We should not use wastes that may contain salt, pickles, oil, vinegar and milk products as food for redworms because these substances attract disease-causing small organisms in pit which may harm redworms ultimately hindering the preparation of vermicompost.

Question 5.
We should not burn or heat plastics, why?
Answer:
All kind of plastics give out harmful gases, upon heating and burning. These gases cause many health problems, including cancer, asthma, etc., which sometimes may cause death.

Question 6.
What can we do to minimise overuse of plastics?
Answer:
We should take following steps to minimise overuse of plastics:

1. We should avoid using plastic bags to store eatables.
2. We should not throw plastic bags here and there, after use.
3. We should never burn plastic bags and other plastic items.
4. We should not put garbage in plastic bags and throw it away.

Question 7.
Why should we not throw garbage in plastic bags?
Answer:
We should not throw garbage in plastic bags because when stray animals looking for food in these bags, usually knotted, are unable to reach the food and they end up eating the whole plastic bag. Sometimes, they die due to this. The plastic bags thrown carelessly on roads and other places get into drains and the sewer system. As a result, drains get choked and water spills on the roads which might even create a flood like situation during heavy rain.

Question 8.
How is compost prepared from kitchen wastes?
Answer:
The kitchen wastes generally include vegetable and fruit peels, egg shells, waste food etc., which are completely biodegradable. We put these waste into a pit and cover them with soil. After some days, we observe that they are completely degraded. Take them out of the pit and mix it in the soil where you grow your favourite plants. The final form of the wastes mixed with soil is called compost.

Garbage in Garbage Out Class 6 Extra Questions Long Answer Type

Question 1.
What is a garbage? Explain with examples. What will happen if garbage is not removed from our homes and surroundings regularly?
Answer:
Waste materials or rubbish that include refuse, domestic wastes, used plastic items and wrapping materials are called garbage. Every house produces a lot of garbage daily. Garbage is produced also by offices, shops, schools, etc., every day. Kitchen wastes include vegetables and fruit peels, egg shells, waste food or left over food, tea leaves, plastic and polythene bags or tins, waste paper, etc.

If these garbages are not removed, our homes and surroundings will become dirty. Some of the garbage give out a foul smell after rotting. The rotting garbage becomes a breeding place for cockroaches, flies and mosquitoes which spread many fatal diseases.

Question 2.
What are the various methods of garbage disposal? Describe the landfill method.
Answer:
There are different methods of disposal of garbage depending on the nature of garbage. Some of the effective measures are:

1. Composting
2. Vermicomposting
3. Recycling
4. Reuse
5. Landfill

Landfill is one of the important and effective measures of garbage disposal. The method is generally adopted in cities/town. Landfill is a low-lying area where the garbage from the cities or towns are collected. It generally outside the city. The non-useful part of garbage which cannot be turned into compost or cannot be recycled or reused is disposed off in a landfill. People throw garbage in the dustbins or at a place meant for this. These garbage is collected by trucks or tractors of the municipal corporation and take it to the landfill areas.

Wastes dumped in landfill is compacted everyday with the bulldozers and then filled with a layer of soil prior to waste placement of next day. This way when the landfill is completely filled, it is turned into a park or a playground.

Question 3.
What are the uses and harms of plastic?
Answer:
Plastics are both useful and harmful.
Its uses are as follows:

1. It is used as container to store edible foods.
2. Goods packed in plastic packs are easily portable, i.e., can be carried anywhere easily.
3. Plastic can be recycled.
4. Plastics are unreactive. So, plastic bottles are used to pack chemicals.
5. Plastic packs or containers are cheap, light weighted and durable.

Its demerits or harm are as follows:

1. On heating or burning, plastic emit harmful gases which cause many diseases including cancer.
2. The plastic bags thrown here and there are swallowed by animals searching for food inside them, which sometimes causes their death.
3. Plastic bags and polythene thrown on roads get into the drains and block the sewer system. Sometimes making the drain choked. During heavy rain, it creates flood-like situation.

Question 4.
What is vermicomposting? Mention the steps for preparing vermicompost.
Answer:
Process of conversion of kitchen wastes and agricultural wastes or biodegradable wastes using redworms is known as vermicomposting. The product so obtained by vermicomposting is known as vermicompost. Vermicompost is an excellent, nutrient-rich organic fertiliser.

For preparing vermicompost, spread a net at the bottom of pit or a box. Add 1-2 cm thick layer of sand and then spread biodegradable wastes like vegetable and fruit peels, green leaves, husk, etc., and sprinkle some water to make the layer wet.

Now buy some redworms and put them into the pit and cover them with gunny bags. Observe the content after 3-4 weeks. If it doesn’t smell bad and there is a loose soil-like material then the process of vermicomposting is complete. Sieve this content and sun dry it.

Question 5.
Excessive use of plastics are harmful. What measure can be adopted to reduce excessive use of plastics?
Answer:
The measures we can adopt to minimise overuse of plastics are:

1. We should try to make minimum use of plastic bags. We must reuse the bags whenever, it is possible to do so.
2. We should not use plastic bags to store eatables.
3. We can insist shopkeepers to use paper bags. We should carry cloth or jute bags while going to market for shopping.
4. We should never throw plastic bags here and there or on roads after use.
5. We should never bum plastics.
6. We should not put garbage in plastic bags and throw it away.
7. We should aware people of using proper practices for disposing plastic bags.

Question 6.
What can we do to minimise garbage generation? ‘
Answer:
We can take following steps to reduce garbage generation.

1. We can adopt the method of vermicomposting at home and deal with our kitchen waste carefully.
2. We should recycle paper, old books, metal cans, glass bottles, etc., by selling these items to kawadiwalas.
3. We should use both sides of paper to write. We should use a slate for rough work.
4. As far as possible, we should make our family, friends and others aware of the garbage hazards and to follow proper practices for disposing different kinds of wastes.
5. In a nutshell, we must bear in our mind and think about that-more garbage we generate, more difficult it will be to get over this menace.

Garbage in Garbage Out Class 6 Extra Questions HOTS

Question 1.
Write one word for the following statements:
(a) Contents of the waste bins
(b) Greeting cards made of waste paper
(c) Redworms converting certain waste into manures
Answer:
(a) Garbage
(b) Paper mache
(c) Vermicomposting

Question 2.
To what use will you put these garbage and how?
(a) Piles of straw after harvesting
(b) Rotting smelly garbage
(c) Metal cans
(d) Non-recyclable nappies, pickles, etc.
Answer:
(a) Convert into compost and use as manure.
(b) Convert into compost and use as manure.
(c) Give for recycling or reuse it.
(d) Throw in landfill as they can’t be either use for composting or recycling.

Question 3.
Why do earthworms are called farmer’s Mend?
Answer:
Earthworms are called farmer’s Mend because of the services provide by them in increasing and improving soil fertility, texture and moisture holding capacity which consequently benefits the plant. They decompose the organic matter into manure and improve the aeration of soil as they dwell in.

Question 4.
Most of the time we observe that rag pickers suffer from diseases. Why?
Answer:
Rag pickers work barefoot and without gloves in an unhygienic environment full of contaminated materials. Their entire workplace is actually a breeding ground of mosquitoes which carry various infectious diseases with them. So they often suffer from diseases.

Question 5.
Write merits and demerits of landfill.
Answer:
The merits of landfills include low operating costs and the ability to dispose of large amount of wastes. Demerits include possible water contamination and emission of greenhouse gases.

Garbage in Garbage Out Class 6 Extra Questions Value Based (VBQs)

Question 1.
Anandi thought of cleaning her room. While cleaning she found many of her old things and toys in good condition. She got an idea that beside throwing these things she can give these to an orphanage where children of her age can use these.
(a) What is waste?
(b) Which is better-reuse or recycle? Why?
(c) Which of the method of 3R’s is been used by Anandi here?
(d) What values of Anandi is shown here?
Answer:
(a) Things that are no longer useful or wanted and discarded are known as waste.
(b) Reuse is the better method of waste management than recycle, because reuse needs negligible energy as compared to recycle.
(c) Anandi by giving her belongings to orphanage is using the method of reuse amongst the 3R’s.
(d) Anandi is environment concern, sensible, responsible and intelligent girl.

Question 2.
Rishabh and Rishikesh both are best friends. Rishabh is very particular in segregating the waste generated in his house. He makes compost out of his kitchen waste and use this compost in manuring his potted plants. Rishikesh do not bother of segregating his household waste and even throws wrappers and plastics in the roads.
(a) Out of the 3R’s which one is suitable for plastics?
(b) What are the effects of plastic on the environment?
(c) Compare Rishabh’s and Rishikesh’s attitude towards environment.
(d) What value of Rishabh is shown here?
Answer:
(a) We must minimise the use of plastics so ‘reduce’ is the best way for checking waste generation.
(b) Plastics are non-biodegradable waste. Excessive use of plastics and their improper disposal is causing environmental degradation. Plastics even can’t be burnt because of the toxic gases released by them. Most of the plastics are non-recyclable also.
(c) Rishabh is eco-friendly but Rishikesh is not eco-friendly.
(d) Rishabh is intelligent, hardworking, sensible to environmental degradation and eco-friendly.

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Class 6 Science Chapter 15 Extra Questions and Answers Air Around Us

Extra Questions for Class 6 Science Chapter 15 Air Around Us with Answers Solutions

Air Around Us Class 6 Extra Questions Very Short Answer Type

Air Around Us Class 6 Questions And Answers Question 1.
Name some musical instruments in which air plays an important role.
Answer:
Flute, saxophone, trumpet, horn, etc.

Air Around Us Class 6 Extra Questions And Answers Question 2.
What do human beings release during respiration?
Answer:
Co2

Air Around Us Class 6 Worksheet With Answers Question 3.
What is the layer of air that surrounds the earth is called?
Answer:
Atmosphere

Class 6 Science Chapter 15 Extra Question Answer Question 4.
What is the necessary condition for the combustion to take place?
Answer:
Presence of air

Class 6 Science Chapter 15 Extra Questions Question 5.
Which gas is present in the atmosphere which is essential for breathing?
Answer:
Oxygen

Air Around Us Class 6 Extra Questions Question 6.
Which component of air acts as a supporter of combustion?
Answer:
Oxygen

Class 6 Science Chapter 15 Question Answer Question 7.
Which component of air acts as a non-supporter of burning?
Answer:
Nitrogen and carbon dioxide.

Class 6 Science Ch 15 Extra Questions Question 8.
Why transparent glass window becomes hazy, if not wiped off regularly?
Answer:
Because dust particles settle on it.

Ncert Class 6 Science Chapter 15 Extra Questions Question 9.
Name one insect which lives deep under the soil.
Answer:
Earthworm

Class 6 Air Around Us Extra Questions Question 10.
What is moving air called?
Answer:
Moving air is called wind.

Class 6 Science Air Around Us Extra Questions Question 11.
Which gas is the major component of air? State its composition.
Answer:
Nitrogen gas (78%)

Extra Questions On Air Around Us Class 6 Question 12.
What is the relative proportions of nitrogen and oxygen in the air?
Answer:
4:1

Questions On Air Around Us Class 6 Question 13.
Name a device which uses wind energy to generate electricity.
Answer:
Windmill

Chapter 15 Science Class 6 Extra Questions Question 14.
Name the device which shows the direction of wind.
Answer:
Weather cock

Extra Questions Of Air Around Us Class 6 Question 15.
Why do earthworms come out of the soil during heavy rains?
Answer:
During heavy rain, water fills up the spaces occupied by air. So earthworms have to come out to breathe air.

Air Around Us Class 6 Extra Questions Short Answer Type

Question 1.
Why air is considered as mixture?
Answer:
Air contains oxygen and nitrogen as its major constituents along with carbon dioxide, and other gases. These gases retain their properties in air. So, the air is called a mixture.

Question 2.
Name the major constituents of air. Also give their volume proportions in air.
Answer:

Name of-constituents	% Composition
Nitrogen	78.1%
Oxygen	20.9%
Carbon dioxide	0.03%
Argon	0.9%
Other components of air are water vapour and dust particles.

Question 3.
What is atmosphere?
Answer:
The thin layer of air that surrounds the earth as an envelope is called atmosphere.

Question 4.
What is smoke?
Answer:
The dark-coloured gases caused by burning of anything is called smoke.

Question 5.
State the properties of air.
Answer:
Properties of air are as follows:

1. It is colourless
2. It is transparent
3. It is compressible
4. It occupies space
5. It is soluble in water
6. It has mass

Question 6.
What will happen if the amount of oxygen is increased in the air?
Answer:
Air will become more combustible and many substances may undergo fast oxidation.

Question 7.
State the properties of oxygen gas.
Answer:
Oxygen is a colourless, tasteless and odourless gas. It is soluble in water. Oxygen gas is essential for breathing (or respiration).

Question 8.
Why do you think, policemen wear masks?
Answer:
Policemen wear masks to prevent dust particles from getting into their respiratory system.

Question 9.
What do you mean by relative humidity?
Answer:
The content of water vapour in the air is expressed in the terms of humidity or relative humidity.

Question 10.
Why during an incident of fire, one is advised to wrap a woollen blanket over a burning object.
Answer:
Air is supporter of combustion. To cut-off the supply of air from the burning object it is advised to wrap a woollen blanket around it.

Air Around Us Class 6 Extra Questions Long Answer Type

Question 1.
What is the importance of water vapour in air?
Answer:
When air comes in contact with a cool surface, it condenses and forms tiny drops of water on the cooled surfaces. The presence of water vapour in the air is important for maintaining the water cycle in nature.

This is because it is water vapour present in the air which rises high in the sky along with hot air, get cooled, condenses to form clouds and then brings rain on the earth.

Question 2.
Explain briefly carbon dioxide gas and its properties.
Answer:
Carbon dioxide is a colourless and odourless gas. It is soluble in water. It neither burns nor supports burning. Co2 extinguishes a burning fire. Plants and animals consume oxygen for respiration and produce Co2 which is necessary for photosynthesis. It is an important greenhouse gas.

Question 3.
What are the uses of air?
Answer:
Air is useful to human beings in many ways. Some of the important uses of air are as follows:

1. It is used for breathing purpose.
2. It is used for burning fuels to make fire.
3. It helps the birds, bats and insects in flying.
4. It plays an important role in the water cycle in nature.
5. Compressed air is used in tyres of various kinds of vehicles.
6. It also helps in the dispersal of seeds and pollens of flowers of several plants.

Question 4.
Why the animals living deep inside the soil come out during heavy rains?
Answer:
The air is present in spaces between particles of soil. Animal living inside the soil get oxygen for breathing (or respiration) from the air present between the soil particles. However, when it rains heavily water fills up the spaces occupied by the air in the soil.

In this situation, the animals living inside the soil have to come out of the soil to obtain air for breathing. For example, the earthworms come out of the soil only during heavy rains.

Question 5.
Why we must always breathe in through our nose and not by our mouth?
Answer:
We inhale air when we breathe through our nostrils. We also know that air contains dust particles. To prevent dust particles from getting into the respiratory system, fine hair and mucus are present inside the nose.

Since our mouth does not contain the above-discussed barriers of dust, so if we breathe through it, dust particles may enter in our respiratory tract. This is why breathing through mouth is not suggested.

Air Around Us Class 6 Extra Questions HOTS

Question 1.
How will you prove that air is a mixture of several gases and not a compound?
Answer:

• The component of air varies from place to place.
• Components of air can be separated out.
• Different components of air retain their properties.

Question 2.
Why long chimneys are present in factories?
Answer:
Most of the factories produces harmful smoke and gases. So factories have long chimneys to carry these harmful gases away from our noses.

Question 3.
How nature maintains a balance of Co2 and o2 in atmosphere?
Answer:
Plant releases oxygen which is consumed by animals in the process of respiration. Animals release carbon dioxide which is consumed by the plants for the process of photosynthesis.

Question 4.
There are two colourless and odourless gases in jars A and B. One is oxygen and other is carbon dioxide. How will you detect which jar contain oxygen and which contain carbon dioxide gas?
Answer:
We can detect the gas as oxygen or carbon dioxide by bringing a burning splinter near the mouth of the jars. The gas which will support burning is oxygen gas and which will not support burning, i.e., extinguishes a burning splinter, is carbon dioxide gas.

Question 5.
Why is atmosphere important for sustenance of life on the earth?
Answer:
Atmosphere is important for the following reasons:

1. It keeps the temperature of earth fairly constant.
2. It contains all the gases essential for sustaining life.
3. It protects us from harmful UV radiations.
4. It maintains water cycle.

Air Around Us Class 6 Extra Questions Value Based (VBQs)

Question 1.
Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. She was amazed and asked about this phenomenon to her science teacher.
(a) Why Garima observed tiny bubbles inside the bottle?
(b) What will happen to the bubbles if we bring it back to normal room temperature?
(c) When do we see the above phenomenon in nature and what is its significance?
(d) What values of Garima is shown here?

Answer:
(a) As the water in the bottle get warm due to the heat of sunlight air dissolved in it escaped and appeared as tiny bubbles.
(b) Tiny bubbles will again disappear in the water.
(c) We see the above phenomenon in summer season when oxygen dissolved in water reduces due to hot temperature and because of this aquatic life suffers.
(d) Garima is observable, intelligent, curious girl with scientific temperament.

Question 2.
While going for a local excursion to a deserted area, Vikas wore a mask. When boarding the school bus his friends made fun of him that he was looking odd and beside enjoying he is taking extra precautions. But when going through the dry roads all of his friends felt the need of the mask. He suggested everyone to tie handkerchief on their nose. It helped them a lot.
(a) What is dust?
(b) What are the health issues related with dust?
(c) How does a mask help?
(d) What values of Vikas is shown here?

Answer:
(a) Dust is tiny particles of earth or waste lying on ground or carried by the air.
(b) Dust particles badly effects our respiratory system. It may cause asthma, allergy, respiratory problems, etc.
(c) Mask acts as a barrier for the entry of dust particles directly into our nose. It filters the air.
(d) Vikas is intelligent, helpful and have future vision.

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Class 6 Science Chapter 10 Extra Questions and Answers Motion and Measurement of Distances

Extra Questions for Class 6 Science Chapter 10 The Living Organisms and Their Surroundings with Answers Solutions

Motion and Measurement of Distances Class 6 Extra Questions Very Short Answer Type

Class 6 Science Chapter 10 Extra Questions Question 1.
Name the invention which made a great change in modes of transport.
Answer:
Invention of wheel.

Motion And Measurement Of Distances Class 6 Extra Questions Question 2.
What kind of motion produce sound?
Answer:
Vibratory motion

Ncert Class 6 Science Chapter 10 Extra Questions Question 3.
What is the full form of SI unit?
Answer:
International System of unit.

Motion And Measurement Of Distances Class 6 Extra Questions And Answers Question 4.
Name the ancient modes of measurement.
Answer:
Handspan, cubit, finger, fathom, pace, etc.

Class 6 Science Ch 10 Extra Questions Question 5.
Which power was used to pull vehicles in ancient times?
Answer:
Animal power

Motion And Measurement Of Distances Class 6 Worksheet With Answers Question 6.
Name the two parts which must be mentioned to state the result of a measurement.
Answer:
Magnitude and unit.

Motion And Measurement Of Distances Class 6 Questions And Answers Question 7.
What type of measuring device would you use to measure the girth of a tree?
Answer:
Measuring tape

Measurement And Motion Class 6 Questions And Answers Question 8.
Which system of measurement is used now-a-days?
Answer:
SI system

Measurement And Motion Class 6 Questions Question 9.
Name the SI unit of length.
Answer:
Metre (m)

Chapter 10 Science Class 6 Extra Questions Question 10.
Which unit of length is used for measuring very small distance?
Answer:
Millimetre (mm)

Class 6 Chapter 10 Science Extra Questions Question 11.
Which unit of length is used for measuring larger distances?
Answer:
Kilometre (km)

Motion And Measurement Of Distances Extra Questions Question 12.
Which unit of measurement is used to measure the quantity of milk?
Answer:
Litre or millilitre

Motion And Measurement Of Distances Question Answer Question 13.
Give an example of circular motion.
Answer:
The movement of earth around the sun.

Class 6 Science Chapter 10 Extra Questions And Answers Question 14.
What type of motion do the vehicle on a straight road have?
Answer:
Rectilinear motion

Class 6 Science Chapter 10 Extra Question Answer Question 15.
What type of motion is shown by the wheel of a bicycle?
Answer:
Circular motion

Question 16.
State the type of motion exhibited by a falling stone.
Answer:
Rectilinear motion

Question 17.
Give one example of rotational motion.
Answer:
The spinning of earth on its axis.

Question 18.
Name two devices which are commonly used for measuring length.
Answer:
Ruler and measuring tape.

Question 19.
What is a fixed quantity called?
Answer:
Unit

Question 20.
When was SI unit recommended by the general conference of weights and measures?
Answer:
1960

Motion and Measurement of Distances Class 6 Extra Questions Short Answer Type

Question 1.
What is measurement?
Answer:
Measurement is defined as the comparison of some unknown quantity with a fixed quantity of the same kind.

Question 2.
What is a standard unit?
Answer:
A standard unit is a standard measure that has some definite and convenient quantity in it so that it remains the same wherever and by whoever it is used.

Question 3.
Define rest and motion.
Answer:
Rest: The object which do not change their positions with the time are said to be at rest.
Motion: The object which change their position with time are said to be in motion.

Question 4.
Why it is important to know how far a place is?
Answer:
It is important to know how far a place is, so that we can have an idea how we are going to reach that place, i.e., by walking, taking a bus or train, a ship, an aeroplane or even a spacecraft.

Question 5.
What is meant by rectilinear motion? Give two examples.
Answer:
The motion in a straight line is called rectilinear motion. For example, motion of a bullet fired from gun and motion of a stone falling down from a height.

Question 6.
Define periodic motion. State two examples.
Answer:
The motion which repeats itself after regular intervals of time, is called periodic motion. The two examples are
(i) revolution of moon around the earth and
(ii) revolution of earth around the sun.

Question 7.
Give one example each of the following types of motion:
(a) Linear
(b) Rotational
(c) Circular
(d) Periodic
Answer:
(a) Linear: Motion of a falling stone
(b) Rotational: The motion of a spinning top
(c) Circular: The movement of moon around the earth
(d) Periodic: The motion of a second’s hand of a watch

Question 8.
How is time related to motion?
Answer:
Motion and time are inseparable part. Motion is change in the position of an object with respect to time. In absence of time it will be hard to determine the motion of an object.

Motion and Measurement of Distances Class 6 Extra Questions Long Answer Type

Question 1.
What is meant by a standard unit of measurement? Why is it necessary to have standard units of measurement? Name the SI unit of length. Write its symbol.
Answer:
A unit of measurement which has a fixed value and does not change from person to person or place to place, is called a standard unit of measurement. It is necessary to have standard units of measurements for the sake of uniformity in measurement. The SI unit of length is metre. Its symbol is m.

Question 2.
State the procedures for the measurement of length using a metre scale.
Answer:
While measuring length using a metre scale, we must follow the steps given below:

1. The ruler should be kept along the length of the object so that the zero mark on the ruler coincides with the one end of the object. The ruler should be parallel to one of the edges.
2. While taking the measurement, the eyes should be correctly positioned. The eye must be exactly vertically above the point where the measurement is to be taken.
3. If the edge of the ruler is worn out or broken, the measurement should be taken from any other full mark of the ruler.

Question 3.
What are the reasons for which SI system is recommended?
Answer:
SI system is recommended for the following reasons:

1. It is standardised unit, therefore, it is accepted universally.
2. Even minute measurements are possible in this system.
3. Interconversions within the system make calculation easy.
4. The units do not change with time or place.

Question 4.
What is meant by (a) circular motion and (b) rotational motion? Give two examples of circular motion and two examples of rotational motion.
Answer:
(a) Circular motion: When an object moves along a circular path, it is called a circular motion.
Example:
(i) The movement of moon around the earth
(ii) The movement of earth around the sun

(b) Rotational motion: When an object twines or spins about a fixed axis, it is called rotational motion.
Example:
(i) The motion of a spinning top
(ii) The spinning of earth on its axis.

Question 5.
How will you measure the length of any curved line using a divider?
Answer:
Let there be a curved line AB (Fig. 10.8). Open the legs of the divider to cover some convenient distance. Place one leg of the divider at one end of the curved line and put the other leg on the line.

Now count the number of times the divider has to be taken along the line to cover the entire length of line AB. At the end, some portion of line may be left out, being less than the distance between the two legs. Measure it separately by adjusting the divider. Multiply the number of complete steps by the distance between the two legs. Add the length of the remaining distance to this length. You will get the total length of the curved line.

Motion and Measurement of Distances Class 6 Extra Questions HOTS

Question 1.
If you are given a woollen thread and a cotton thread and asked to measure the length of a curved line which thread will you prefer?
Answer:
Cotton thread will be preferred over woollen thread as it neither sinks nor extends and will give comparatively accurate result.

Question 2.
Would the distance of the stone from your hand will be same when you whirl it around? Give reason.
Answer:
Yes because the length of the string with which we have hold the stone is not changing.

Question 3.
Can you think of some objects which are exhibiting more than one type of motion? Also mention the type of motion in them.
Answer:
A cycle shows both rotational as well as rectilinear motion.

Motion and Measurement of Distances Class 6 Extra Questions Value-Based (VBQs)

Question 1.
Rahul and Sonia were playing with blocks and each of them made a train out of them. Both of them thought of measuring the length of the train using their handspan. By that time Rahul’s friend Anupam came and suggested them to measure with a measuring tape for fair result.
(a) What is a handspan?
(b) Why Anupam asked both of them to use measuring tape?
(c) What value of Anupam is shown here?
Answer:
(a) The distance between the tip of the thumb and tip of the little finger of a fully stretched hand is called handspan.
(b) To get the accurate result which is not possible with the handspan.
(c) Anupam is an intelligent and active boy.

Question 2.
Ishika was asked by her teacher to measure the length of the line drawn on the blackboard. She immediately took out her scale to measure the line. But she noticed that the end of her scale is broken. She felt very sad and said to the teacher that she would not be able to measure the length of the line. Teacher consoled her and taught her a new method of measuring line using the same scale.
(a) What is a scale?
(b) Name devices that can be used to measure length.
(c) What new method of measuring line by using a broken scale was taught by Ishika’s teacher?
(d) What values of Ishika is shown here?
Answer:
(a) A straight strip of wood, metal or plastic used for drawing straight line and measuring length.
(b) Measuring tape and ruler.
(c) If the end of a scale is broken, one can use any full mark of the scale and then subtract the reading of this mark from the reading at the other end.
(d) She got nervous easily and sensitive.

In this page, we are providing Getting to Know Plants Class 6 Extra Questions and Answers Science Chapter 7 pdf download. NCERT Extra Questions for Class 6 Science Chapter 7 Getting to Know Plants with Answers will help to score more marks in your CBSE Board Exams. https://ncertmcq.com/extra-questions-for-class-6-science/

Class 6 Science Chapter 7 Extra Questions and Answers Getting to Know Plants

Extra Questions for Class 6 Science Chapter 7 Getting to Know Plants with Answers Solutions

Getting to Know Plants Class 6 Extra Questions Very Short Answer Type

Class 6 Science Chapter 7 Extra Questions Question 1.
What are the plants having green tender stems called?
Answer:
Herbs

Getting To Know Plants Class 6 Extra Questions And Answers Question 2.
What type of root wheat plant have?
Answer:
Fibrous root

Getting To Know Plants Class 6 Pdf Questions And Answers Question 3.
Name one plant which has reticulate venation?
Answer:
Marigold

Getting To Know Plants Class 6 Questions And Answers Question 4.
Name the part of plant which produces food.
Answer:
Leaves

Class 6 Science Chapter 7 Getting To Know Plants Question Answer Question 5.
Name the part of a flower which becomes fruit after fertilization.
Answer:
Ovary

Getting To Know Plants Class 6 Notes Questions And Answers Question 6.
Name two types of roots found in plants.
Answer:

• Taproot
• Fibrous root

Getting To Know Plants Extra Questions Question 7.
Name the process by which plant make their food.
Answer:
Photosynthesis

Getting To Know Plants Class 6 Question 8.
Name the green pigment present in the leaves of a plant.
Answer:
Chlorophyll

Getting To Know Plants Class 6 Extra Questions Question 9.
Name the parts of plant which grows under the ground.
Answer:
Root grows under the ground.

Class 6 Science Ch 7 Extra Questions Question 10.
Name a plant which has weak stem.
Answer:
Climbers

Ncert Class 6 Science Chapter 7 Extra Questions Question 11.
Name the three types of plants.
Answer:
Herbs, shrubs and trees.

Class 6 Chapter 7 Science Extra Questions Question 12.
Which part of plant holds it upright?
Answer:
Stem

Getting To Know Plants Question Answer Question 13.
Name the tiny pores on the surface of a leaf.
Answer:
Stomata

Class 6 Science Chapter 7 Extra Questions And Answers Question 14.
What is the function of chlorophyll?
Answer:
Chlorophyll imparts green colour to the leaves.

Class 6 Getting To Know Plants Extra Questions Question 15.
Give one function of stem
Answer:
Stem helps in transportation of water and food in the plants.

Question 16.
Name some plants having taproot.
Answer:
Mango tree, turnip, carrot, beet, etc.

Question 17.
Give some examples of plants having fibrous roots.
Answer:
Millet, bamboo, sugar cane, sweet potato, etc.

Question 18.
What kind of stem do shrub have?
Answer:
Hard but not very thick.

Question 19.
What is the life span of shrubs?
Answer:
Many years but it is less than that of trees.

Question 20.
What kind of stem do herbs have?
Answer:
Soft and delicate stem.

Getting to Know Plants Class 6 Extra Questions Short Answer Type

Question 1.
What are herbs?
Answer:
Herbs are small plants having a soft and delicate stem.

Question 2.
What are shrubs?
Answer:
Shrubs are medium-sized plants with a hard and woody stem branching out near the base. Though stem of a shrub is hard but it is not very thick.

Question 3.
What is pistil?
Answer:
The pistil is the female part of a flower. It is also known as carpel.

Question 4.
Define taproot.
Answer:
A taproot is a straight tapering root which grows vertically down into the soil and gives out branches on all the sides.

Question 5.
What is root?
Answer:
Root is a part of a plant which is below the ground (in the soil). There are two types of roots:

• Taproot
• Fibrous root.

Question 6.
What are plants?
Answer:
Plants are living things. Each plant has many parts to perform different functions for its survival. The main parts of plant are root, stem, branches, leaves, flowers and fruits.

Question 7.
What are fibrous roots?
Answer:
Some plants do not have main root. They have a bunch of similar roots called fibrous roots.

Question 8.
Name the different parts of flowers.
Answer:
A flower consists of following parts:

1. Pedicel
2. Sepals
3. Petals
4. Stamens
5. Carpel

Question 9.
Define pollination.
Answer:
Transfer of pollen grains from anther to stigma of a flower is known as pollination.

Question 10.
What is a tree?
Answer:
Trees are tall and big plants with a hard and thick woody stem.

Question 11.
What are creepers?
Answer:
A plant having thin, long, and weak stem which cannot stand upright and spreads in the ground are known as creepers.

Question 12.
What are climbers?
Answer:
A plant having thin, long and weak stem which cannot stand upright, but readily climbs up neighboring support or a tree is called climber.

Question 13.
What is the main difference between climbers and creepers?
Answer:
The main difference between climbers and creepers is that the climber plants have climbing organs like tendrils but the creeper plants have no such climbing organs.

Question 14.
What is a flower?
Answer:
Flowers are the most beautiful part of a plant. Different plants have different types of flowers. Flowers are of many sizes, shapes and colours.

Question 15.
Define parallel venation.
Answer:
The type of venation in which the veins in a leaf run parallel to one another on both sides of the midrib is called parallel venation. For example, paddy, maize, millet, etc.

Getting to Know Plants Class 6 Extra Questions Long Answer Type

Question 1.
What is root? List the main functions of root.
Answer:
Root is that part of a plant which is below the ground (in the soil). The main functions of roots are as follows:

1. Root absorb water and nutrients from the soil which are needed by plant leaves to make food.
2. Roots help in holding the soil together and thus prevents soil erosion.
3. Roots help the plant to stand erect. This prevents the plant from being pulled out easily or blown away by the wind.
4. Some plants have modified roots which store food for the plants like beetroot, radish, carrot.

Question 2.
What are the functions of flower?
Answer:

1. A flower is the seat or organ of sexual reproduction and results in the formation of fruits and seeds. Seeds on germination give rise to new plants. A flower thus, results in multiplication of plants.
2. It is the source of food for many insects.
3. Flowering plants are grown in gardens and in homes because of the bright colour and fragrance of the flowers. Therefore, they beautify the surroundings and provide aesthetic value.

Question 3.
Explain the process of preparation of food in leaves.
Answer:
Leaves are the food factories of the plant. They make food for the plant by the process of photosynthesis. In photosynthesis, the green leaves of a plant combine carbon dioxide and water in the presence of sunlight and chlorophyll. This can be written as:
image 1

Question 4.
What are herbs, shrubs and trees? Give two examples of each.
Answer:

1. Herbs: Herbs are small plants having a soft and delicate stem. Herbs do not have woody stem. They are non-woody plants. Herbs have a green and tender stem. They are short sized plants. Herbs have short life span. For example, tomato, cabbage.
2. Shrubs: Shrubs are medium-sized plants with a hard and woody, branching out near the base. Shrubs tend to branch near ground level, so many branches are seen rising just above the ground giving them a bushy appearance. For example, lemon, tulsi, etc.
3. Trees: Trees are tall and big plants with hard and thick woody stem. The trees have one main stem called trunk which usually gives out branches and leaves. For example, neem, mango, etc.

Question 5.
What is stem of a plant? State the various functions of the stem in a plant.
Answer:Stem is the part of plant which rises vertically up from the ground. The main functions of the stem of a plant are as follows:

1. The stem holds the plants upright.
2. The stem of a plant carries water and minerals from the roots to the leaves and other parts of the plants.
3. The stem carries the prepared food from the leaves to other parts of the plant.
4. The stem holds the leaves in such a way that the leaves are able to get plenty of sunlight for preparing food by photosynthesis.

Question 6.
What is leaf? What are its functions?
Answer:
The leaf is a thin, broad, flat and green part of a plant which is attached to the stem (or branch). The leaves of plants have three main functions:

1. The leaves make food for the plant by photosynthesis.
2. The leaves get rid of excess water from the plant through transpiration.
3. The leaves carry out the process of respiration in plants.

Question 7.
Draw a labelled diagram of a flower.
Answer:
The main parts of a flower are sepals, petals, stamen and pistil.

Question 8.
What is a fruit?
Answer:
A fruit is that part of a plant that contains the seeds. Apples, oranges, plums, etc., are the example of fruits. The fruits and seeds are formed from flowers by the process of pollination and fertilization.

Question 9.
Differentiate between herbs and shrubs.
Answer:

Herbs	Shrubs
1. Herbs are small plants having a soft and delicate stem.	1. Shrubs are medium-sized plants with hard and woody stem.
2. Herbs do not grow more than one metre in height.	2. Shrubs tend to branch near ground level.
3. They have a very short life span, e.g., tomato, cabbage, etc.	3. They have life span shorter than that of trees but more than herbs, e.g., cotton, tulsi, etc.

Question 10.
Differentiate between taproot and fibrous root.
Answer:

Taproot	Fibrous root
1. Taproot has only one main and long root.	1. Fibrous root do not have a main root.
2. Taproot goes deep in the soil.	2. They do not go deep into the soil.
3. Taproots are found in plants which have reticu­late venation in their leaves.	3. These are found in plants which have paral­lel venation in their leaves.

Getting to Know Plants Class 6 Extra Questions HOTS

Question 1.
Write the location of the following:
(i) Ovule
(ii) Pollen grains
(iii) Endosperm
Answer:
(i) Ovary
(ii) Anther
(iii) Seed

Question 2.
Write the name of plant parts which perform the following functions:
(i) Anchoring
(ii) Transportation
(iii) Preparing food
(iv) Reproduction
(v) Germination
Answer:
(i) Root
(ii) Stem
(iii) Leaves
(iv) Flower
(v) Seed

Question 3.
Which part of the flower is necessary for reproduction? Why?
Answer:
Stamen and pistil are necessary for reproduction as they produce male gamete and female gamete respectively. Petals helps in attracting insects for pollination as they are variously coloured whereas sepals protect the flower buds. Both petals and sepals are accessory parts of the flower.

Question 4.
What is the function of seed coat?
Answer:
Seed is surrounded by a tough covering called seed coat. It protects the seed from outer harsh environment.

Question 5.
What is the main difference between climbers and creepers?
Answer:
Climbers need support whereas creepers can grow along the ground. Climbers have tendrils for climbing but creepers do not have this structure.

Getting to Know Plants Class 6 Extra Questions Value Based Question (VBQs)

Question 1.
Rima kept some soaked gram seeds for sprouting. But she forgot about this. On fifth day she suddenly remembered and opened the container having seeds. She found that small leaves along with white sprouts have grown out of the seed.
(a) What does the white structure of sprout give rise to?
(b) What kind of root is found in gram plant?
(c) Why Rima found small leaves in the sprouts?
(d) What value of Rima is shown here?
Answer:
(a) White structure of the sprout give rise to root of the plant.
(b) Taproot.
(c) Rima kept the soaked gram seeds for many days so they germinated into young plants.
(d) Rima is careless, forgetful but at the same time she is a good observer.

Question 2.
Rakesh while walking in his terrace garden found many types of wasp wandering around the flowers. He thought that these insects are spoiling his flower and immediately took out the insect collecting net to get rid of them. On seeing this Rakesh’s elder brother stopped him from doing this and said that these wasps are flower’s friends.
(a) What do these wasps get from the flowers?
(b) Why Rakesh’s elder brother call these wasps as ‘flower’s friend’?
(c) What is pollination?
(d) What value of Rahul’s elder brother is shown here?
Answer:
(a) Wasps get pollen and nectar from the flowers.
(b) Wasps help in transfer of pollen grains from anther to stigma. Thus, it helps in pollination.
(c) Pollination is the transfer of pollen grains from anther to stigma of a flower.
(d) Rahul’s elder brother is eco-friendly, intelligent, empathy and helpful.

Question 3.
After learning about types of roots Amrita was too curious to see types of roots in different plants. She started uprooting plants from the garden. Shweta, her friend and classmate, on seeing this stopped her and told her that one can determine the kind of root by just seeing the leaves. We need not require to uproot the plants.
(a) What are the two types of roots?
(b) How leaves can determine the type of roots?
(c) What value of Shweta is shown here?
Answer:
(a) Two types of roots are taproot and fibrous root.
(b) The design made by veins in a leaf is called the leaf venation. The pattern of leaf venation determines the type of roots present in a plant. If the leaf have reticulate venation then it has taproot and if the leaf have parallel venation then it has fibrous root.
(c) Shweta is intelligent, eco-friendly and have scientific aptitude.