What causes air pressure? Why does air pressure decrease with increasing altitude?
What will be an ideal response?
ANSWER: The amount of force exerted over an area of surface is called atmospheric pressure or, simply, air pressure. The pressure at any level in the atmosphere may be measured in terms of the total mass of air above any point. As we climb in elevation, fewer air molecules are above us; hence, atmospheric pressure always decreases with increasing height. Like air density, air pressure decreases rapidly at first, then more slowly at higher levels.
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