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3 votes
Air pressure is _____.

gravity's pull on air molecules
higher the farther you are from Earth's surface
about 5 lbs per square inch at sea level
difficult to measure

User Aviram
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2 Answers

7 votes

Air pressure is the weight of air on an area. The weight of air
is due to the gravitational forces between the Earth and the
molecules of its atmosphere.

3 votes
Gravity's pull on air molecules.
User Jeyavel
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