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.
Answer
A
Air is less dense on a mountaintop than at sea level.
B
Air pressure is lower at low altitudes.
C
As you climb a mountain, air pressure increases.
D
More force pushes on the air at the bottom of an air column.
E
As you descend a mountain, air molecules are closer together.
Explanation
Air pressure and density generally decrease as altitude increases, so air on a mountaintop is less dense than air at sea level (A). At the bottom of an air column, the weight of the air above pushes down, producing greater pressure (D). As you descend, air pressure and density increase, so air molecules are closer together (E).
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