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What are some facts about the exosphere?

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Quick Answer

As the highest layer of the atmosphere, the Earth's exosphere contains very thin air and features both lower and upper boundaries. The exosphere's boundaries vary by altitude depending on the level of the sun's activity and solar radiation emissions. There is some debate among scientists as to whether the exosphere should be considered a layer of the atmosphere or a part of space.

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The exosphere is also known for not having many molecular collisions and for having low molecular densities. The Earth's exosphere contains the following gases: carbon dioxide, hydrogen, oxygen and helium. Below the Earth's exosphere is the thermosphere, followed by the mesosphere, stratosphere and troposphere.

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    What are some facts about the stratosphere?

    A:

    Moving up from the surface, the stratosphere is the second layer of the Earth's atmosphere, beginning between 5 and 10 miles (26,000 to 53,000) feet up. There is very little water vapor present or cloud formation occurring in the stratosphere, but this layer holds about 19 percent of the total gas in the atmosphere.

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  • Q:

    What is the air pressure in the exosphere?

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    What are the layer of gases that surround the Earth?

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    What is the atmosphere?

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