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What is the direct effect of intense surface heating in convectional rainfall?

Answer and explanation

Correct answer: Warm moist air rises

Answer: D. Strong surface heating warms the air touching the ground. Warm air becomes less dense than the surrounding cooler air, so buoyancy makes it rise. If this air contains moisture, it expands and cools as it rises. Cooling can bring the air to saturation, after which condensation forms clouds. Continued uplift and condensation may produce convectional showers or thunderstorms. D is correct because the immediate effect of heating is the upward movement of warm, moist air; cloud and rain formation occur in later steps. A is wrong because heating does not automatically remove moisture. B is wrong because ice-crystal deposition is not the direct response to surface heating. C is wrong because mountains are not the mechanism described in convectional rainfall. Memory cue: “Surface heating starts convection: warm moist air rises, cools, condenses.”

Related tags

Convectional RainfallSurface HeatingRising AirCondensationClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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