Question

What happens to the density of air as altitude decreases?

OA. The density of air increases.
OB. The density of air decreases.
OC. The density of air stays the same.
OD. The density of air changes randomly.

Answer 1

The density of air decreases as altitude decreases.

Step-by-step explanation:

The density of air decreases as altitude decreases. This is because as altitude increases, there is less pressure on the air particles, causing them to spread out and occupy a larger volume. As a result, the same number of air particles are spread out over a larger area, leading to a decrease in density.

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