Question

C) Give reason for the following.
1. The earth bulges at the equator and is flattened at the poles.
2. Christmas is celebrated during the summer season in Australia.
3. When India has day, USA has night.
4. The sun rises in the west and set in the east on Venus.​

Answer 1

Answer:

Q1 The bulging of equator and flattening at poles is due to rotation of earth. The rotation of earth creates a centrifugal force which is pseudo effect counter balancing the inward acting centripetal force. This pseudo effect pushes the earth outward, bugling from earth, and flattening at poles.

Q2 Explanation: In the Southern Hemisphere, seasons are in reverse to the Northern Hemisphere, with summer falling in December, January, and February, and with winter falling in June, July, and August. ... These countries still celebrate Christmas on December 25, in their summer, like the northern hemisphere.

Q3India is 11.5 hours ahead of United States. Because India USA are on the opposite sides of the Earth. Thus, when it is day time for India it will be night for USA. As we know the earth rotates form west to east the sun rays first fall on the eastern most longitudes.

Q4But on Venus, the sun rises every 117 Earth days. That means the sun rises two times during each year on Venus, even though it is still the same day on Venus! And because Venus rotates backwards, the sun rises in the west and sets in the east.

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Answer 2

1.the centrifugal force is more in equator tahn in poles

2.Because Australia is in the southern hemisphere and when there is winter in the northern hemisphere, there will be summer in the southern hemisphere. So when we celebrate Christmas in the northern hemisphere in winter, the people living in Australia( southern hemisphere ) they will be celebrating it in summers.

3.because Earth is rotating

4.Venus is unusual because it spins the opposite direction of Earth and most other planets. And its rotation is very slow. It takes about 243 Earth days to spin around just once. ... And because Venus rotates backwards, the sun rises in the west and sets in the east

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