Question

Give reasons.
a.
Atmospheric pressure decreases with increase in altitude.​

Answer 1

Answer:

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Explanation:

Atmospheric pressure decreases as the height of a surface above ground level increases. This is because, as the altitude increases: the number of air molecules decreases. ... there is less air above a surface.

Answer 2

Answer:

As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude.

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