Question

The earth retains its atmosphere. This is due to

A

the special shape of the earth.

B

the escape velocity, which is greater than the mean speed of atmospheric molecules.

C

the escape velocity, which is less than the main speed of atmospheric molecules.

D

the suns gravitational effect.

Easy
Solution
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Correct option is B)

The earth retains its atmosphere. This is due to the escape velocity being greater than the mean speed of the molecules of the atmospheric gases.

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