Question

match the phrases to explain how air density changes with temperature, water vapor content, and altitude. instructions air density decreases with increasing temperature. air density increases with a drop in water vapor content. increasing altitude results in a decrease in air density. decreasing temperature results in an increase in air density.

Explanation:

Air density is inversely related to temperature. As temperature rises, air molecules move faster and spread out, decreasing density. Water - vapor is lighter than dry air, so a drop in water - vapor content increases air density. With increasing altitude, the weight of the overlying air column decreases, reducing air density. Decreasing temperature causes air molecules to slow down and come closer together, increasing density.

Answer:

Air density decreases - with increasing temperature.
Air density increases - with a drop in water vapor content.
Increasing altitude results - in a decrease in air density.
Decreasing temperature results - in an increase in air density.