How does altitude affect air pressure and density? Check all that apply. Air is less dense on a mountaintop than at sea level. Air pressure is lower at low altitudes. As you climb a mountain, air pressure increases. More force pushes on the air at the bottom of an air column. As you descend a mountain, air molecules are closer together.
Added by Emma S.
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Step 1: Air is less dense on a mountaintop than at sea level. Show more…
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