Page 253 - New Medley 4 Semester 2 PDF (Merged)

The two factors that cause seasons to change are the tilted axis of the Earth and

the revolution of the Earth around the sun.

Let us understand it with the help of the picture given below:

Orbit

North pole

A Earth

North pole
Sun

South pole
Earth
B

South pole

Revolution of the Earth around the sun

When the Earth is in position A, the north pole is tilted towards the sun. So,

the countries in the northern hemisphere like India, China, USA, etc., get more
sunlight and have summer season. On the other hand, the countries in the

southern hemisphere like South Africa, New Zealand, Australia, etc., get less
sunlight and have winter season.

When the Earth is in position B, the north pole is tilted away from the sun.

So, the countries in the northern hemisphere get less sunlight and have winter
season while the countries in the southern hemisphere get more sunlight and

have summer season.
2 • Understanding

Fill in the blanks.

1. The is an imaginary line that passes through the poles of the Earth.

2. The is one half of the Earth.
3. The crust is the layer of the Earth.

4. The and of the Earth cause change in seasons
on the Earth.

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