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In which type of rainfall can clouds form because two different air masses meet?

Answer and explanation

Correct answer: Cyclonic rainfall

Correct answer: D, cyclonic rainfall. Cyclonic or frontal rainfall develops when two air masses with different characteristics, commonly warm and cold air, meet. Because the air masses have different densities, the warmer, lighter air is forced to rise over the cooler, denser air. As the rising air expands and cools, water vapour condenses into cloud droplets; continued uplift may produce rain. A is wrong because orographic rainfall results mainly when moist air is forced to rise over a mountain or hill. B is wrong because convectional rainfall begins when strong heating warms the ground and the air above it rises, rather than requiring two different air masses to meet. C is hail, a type of frozen precipitation, not a main mechanism of rainfall formation. Memory cue: air-mass meeting suggests cyclonic or frontal rainfall.

Related tags

Cyclonic RainfallAir MassesClouds And PrecipitationWater In The AtmosphereGeography

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