CBSE Class 6 Social Science Motions of Earth Assignment

A) Define the following;

1) equinox 2)solstice 3)inclination of axis of the earth

B) Name the following;

1) The circle that divides the earth into a lighted and a dark half

2) The days of equal day and night all over the world

3) Longest day in Southern Hemisphere

4) The period of diffused light before sunrise

5) The period of diffused light after sunset

C) Answer the following questions;

1) Explain briefly with the help of a diagram the earth’s position and resulting conditions during summer and winter in the Northern Hemisphere.

2) Explain with a diagram how rotation causes day and night.

D) Fill in the blanks;

1) On 22 December the sun shines vertically on the ------------at noon.

2) Countries of the -------------Hemisphere have winter in June.

3) Unequal days and nights on the earth are caused by--------------------.

4) The earth makes an angle of ---------- with the orbital plane.

More Questions.........

Q1. What is rotation of Earth?
Ans. Earth rotates on its axis. It completes its round in 24 hours. This is called Rotation of the earth.

Q2. What is meant by “Inclination of the Earth’s axis”?
Ans. The axis of the Earth is an imaginary line that passes through its centre. This axis is inclined to the plane of the earth’s orbit, at an angle of 66½o.

Q3. What causes the cycles of season?
Ans. 1. The revolvation of the earth around the Sun.
2. The inclinations of the earth’s axis at an angle 66½0 to the plane of its orbit.

Q4. Where do the vertical rays of the Sun fall on June 21st?
Ans. On the Tropic of Cancer.

Q5. On September 23rd, which seasons are experienced in the Northern Hemisphere and Southern Hemisphere?
Ans. Northern Hemisphere- Autumn Southern Hemisphere- Spring

Q6. When is the Winter Solstice?
Ans. On 22nd December.

B. Distinguish between the following:

Q7. Summer Solstice and Winter Solstice.
Ans. Summer Solstice - On 21st June, when the Sun shines vertically on the Tropic of Cancer, is called the Summer Solstice.

Winter Solstice - On 22nd December, when the Sun shines vertically on the Tropic of Capricorn, it is called the Winter Solstice.

Q8. Spring Equinox and Autumn Equinox.
Ans. Spring Equinox - On 21st March, it is spring in the Northern Hemisphere. It is called the Spring Equinox.