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Does the amount of oxygen decrease because of gravity

Answer»

Answer:

The atmosphere of Earth is the layer of gases, COMMONLY known as air, that SURROUNDS the planet Earth and is retained by Earth's gravity. ... By VOLUME, dry air CONTAINS 78.09% nitrogen, 20.95% oxygen, 0.93% argon, ... Because the thermopause lies at the lower boundary of the exosphere, it is also referred to as the exobase.

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