Question

Which of the following statement(s) is/are correct regarding warm and cold air?

• A. Warm air is lighter than cold air.
• B. Warm air rises up.
• C. Cold air descends.
• D. Cold air is lighter than warm air.

Answer 1

Answer: (A), (B), (C)

The correct options are
A Warm air is lighter than cold air.
B Warm air rises up.
C Cold air descends.

Warm air is lighter than the cold air. When air gets heated up it expands, occupies a larger volume and becomes less dense than the air surrounding it. Hence, the warm air rises and the cold air descends.