Atmosphere:

The air surrounding and bound to the earth. The mass of air held close to the earth by gravity. The atmosphere is subdivided into four sections: the troposphere- from the earth's surface to an altitude of about 10 km; the stratosphere - from 10 km to 50 km; the mesosphere - from 50 km to 80 km; and the thermosphere- beyond 80 km.

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Information and definitions of the terms been taken from various reliable government publications and we have done our best to verify their accuracy. If you feel any of the definitions are incorrect or needs to be updated please contact us and we will look into it.

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