On a weather map,a line with semicircles indicates a(n)

Name: On a weather map,a line with semicircles indicates a(n)
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Question

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A line with semicircles on a weather map indicates a warm front. A warm front occurs when a warm air mass replaces a cold air mass, and the warm air rises over the cold air, resulting in clouds and precipitation. The semicircles on the map show the direction that the warm front is moving, which is typically from west to east in the Northern Hemisphere.

On a Weather Map,a Line with Semicircles Indicates A(n)