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10-11-2019
Physics

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What causes seasons? A) the changing tilt angle of the earth B) the elliptical orbit of the earth C) differences in the amount of daylight seasonal D) changes in the angle of the sun above the horizon E) none of the above

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10-11-2019

Answer:

A) The changing tilt angle of the Earth

Explanation:

The Earth orbits around the sun in a elliptic plane rather than in a circular orbit. However, the Earth is tilted at an angle equal to [tex]23.5[/tex]° relative to the elliptic orbit around sun. The axis of Earth's rotation is always pointed towards the same direction. Because of Earth's rotation across its own axis, The tilt towards and away from the sun varies throughout the year. The variation of the angle is between [tex]22°[/tex] to [tex]24.5°[/tex].

When the tilt towards sun is maximized in the month of July, Summer is observed in the northern hemisphere. Whereas, when the southern hemisphere is tilted towards the Sun in the month of December, Winter is observed in the Northern Hemisphere.

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