Question

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Which phrase describes air density?
O increases as altitude increases
O equals mass divided by volume
pushes molecules in one direction
exerts less pressure as it increases
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Answer 1

Air density is the measure of how closely packed air molecules are in a given space. It decreases as altitude increases.

Step-by-step explanation:

Air density can be described as the mass of air molecules per unit of volume. It is a measure of how closely packed the molecules are in a given space.

As altitude increases, the air density decreases. This is because at higher altitudes, the air becomes less dense due to the lower atmospheric pressure.

For example, at sea level, where the atmospheric pressure is higher, the air density is greater compared to higher altitudes like on top of a mountain, where the atmospheric pressure is lower, resulting in lower air density.

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