Question: what happens to the air in the exosphere?

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Answer #1:

Gravity prevents it from dispersing just as gravity prevents us from being flung into space because of the earth's rotation.

Eating beans is one way of producing air on earth, although it is not my favorite, for obvious reasons.

Answer #2:

It's true that the atmosphere basically fades out through the exosphere, but these molecules are still held to Earth by gravity. They aren't actually moving away, just fading in density. However, it's true that very light molecules of hydrogen and the like, moving at sufficient velocity, do leave our atmosphere very year. But the amount that leaves is so incredibly negligible that Earth will be destroyed by the death of the Sun long before anyone notices a problem.

Happily for us, oxygen is too heavy to ever escape under anything but artificial circumstances, as is carbon dioxide, so life will never be affected.





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