Solution of Chapter 3. Motions of the Earth (The Earth : Our Habitat Book)

Exercises

1

Answer the following questions briefly.

What is the angle of inclination of the earth’s axis with its orbital plane?
1

Answer the following questions briefly.

Define rotation and revolution.
1

Answer the following questions briefly.

What is a leap year?
1

Answer the following questions briefly.

Differentiate between the Summer and Winter Solstice.
1

Answer the following questions briefly.

What is an equinox?
1

Answer the following questions briefly.

Why does the Southern Hemisphere experience Winter and Summer Solstice in different times than that of the Northern Hemisphere?
1

Answer the following questions briefly.

Why do the poles experience about six months day and six months night?
2

Tick the correct answer.

The movement of the earth around the sun is known as
2

Tick the correct answer.

Direct rays of the sun fall on the equator on
2

Tick the correct answer.

Christmas is celebrated in summer in
2

Tick the correct answer.

Cycle of the seasons is caused due to
3

Fill in the blanks.

(a) A leap year has ___________ number of days.


(b) The daily motion of the earth is _______________.


(c) The earth travels around the sun in _________ orbit.


(d) The sun’s rays fall vertically on the Tropic of ___________ on 21st June.


(e) Days are shorter during ___________ season.