Multiple Choice
When a mass of cold air collides with a mass of warm air, what happens?
A) The boundary between the two air masses keeps them separate, and they do not interact in any way.
B) The cold air is warmed and the warm air is cooled by their mixing.
C) The cold air rises above the warm air.
D) The warm air rises above the cold air.
Correct Answer:

Verified
Correct Answer:
Verified
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