Question

Why do air temperature and pressure decrease with an increase in altitude?

Answer 1

Explanation:

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At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.Since most of the atmosphere's molecules are held close to the earth's surface by the force of gravity, air pressure decreases rapidly at first, then more slowly at higher levels.

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Answer 2

Explanation:

as the altitude increases the temperature decreases as the molecules are loose