Clouds occur when moist air is cooled by
A) expansion when it rises.
B) expansion when it falls.
C) compression when it rises.
D) compression when it falls.

Question

Quizplus · Accepted Answer

When moist air rises, it undergoes expansion due to the decrease in atmospheric pressure at higher altitudes. As the air expands, it cools and if it becomes cool enough, water droplets can condense and form clouds.

Clouds Occur When Moist Air Is Cooled by