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Which condition is most necessary for cumulus to develop into cumulonimbus?

Answer and explanation

Correct answer: Strong vertical growth and unstable moist air

Correct answer: A. Cumulus clouds can grow vertically when warm, moist air near the surface rises in an unstable atmosphere. As the air rises, it cools and condensation releases latent heat, which can help the rising air remain buoyant. Continued strong uplift makes the cloud taller and can transform ordinary cumulus into cumulonimbus, the deep cloud associated with thunderstorms and intense showers. Option A is correct because it includes both the vertical growth mechanism and the moist instability that supports it. Option B is wrong because complete dryness prevents the moisture needed for cloud growth. Option C is impossible because clouds do not become stone. Option D is unrelated because surface frost does not provide the deep upward convection required. Memory cue: cumulus becomes cumulonimbus when moist unstable air keeps lifting it upward.

Related tags

CumulusCumulonimbusAtmospheric InstabilityUpdraftClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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