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Under which conditions can convective clouds develop rapidly?

Answer and explanation

Correct answer: A warm moist surface and unstable air

Correct answer: A, a warm moist surface combined with unstable air. Solar heating warms the ground, and the ground warms the moist air touching it. Because warm air is less dense, it rises. If the surrounding atmosphere is unstable, the rising parcel remains warmer than its surroundings and continues to rise rapidly. As it expands and cools, water vapour condenses into cloud droplets, often producing tall cumulus or cumulonimbus clouds. A is correct because it supplies heat, moisture, uplift, and continued vertical motion. B is wrong because cold, dry, stable conditions suppress rising and condensation. C is wrong because dry air provides little water vapour for cloud formation. D is wrong because surface heating is a major trigger for daytime convection, although other lifting mechanisms can also exist. Memory cue: convection needs “warmth, moisture, and unstable upward motion.”

Related tags

ConvectionCloud DevelopmentUnstable AirMoistureClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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