Multiple Choice Question

Question

The diagram illustrates unequal heating of Earth's surface by the sun which creates warm and cool air masses.

Warm air masses tend to:
A.
Be more dense and flow under cool air masses.
B.
Be lifted up by less dense cool air masses.
C.
Mix easily with cool air masses.
D.
Be less dense and flow over cool air masses.

Answer 1

The correct answer is:

D. Be less dense and flow over cool air masses.

Warm air is lighter (less dense) than cool air, so it tends to rise and flow over cool air masses.