Question

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A weather front occurs when two air masses of differing temperatures meet. When a cold air mass meets a warm air mass, for example, what will happen to the warm air?

Answer 1

The point where these two air masses meet is called a front.
If cold air advances and pushes away the warm air, it forms a cold front.
When warm air advances, it rides up over the denser, cold air mass to form a warm front.
If neither air mass advances, it forms a stationary front.