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## 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.
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?
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?
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?
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?
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?
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?
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.
(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.
(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°
(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.
(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.
(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
(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
(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
(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.
(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.
(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
(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
(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.