Question

multiple-choice question
cool air takes up less space than warm air so we say it ________.
expands
contracts
condenses

Explanation:

Cool air has lower molecular kinetic energy than warm air, so its molecules are closer together, occupying less space. This process of decreasing volume due to lower temperature is called contraction. Expanding would mean taking more space (warm air’s behavior), and condensing refers to phase change (gas to liquid), not volume change from temperature.

Answer:

B. Contracts