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Why is the presence of cloud alone not enough for rainfall?

Answer and explanation

Correct answer: Droplets must also grow to a size large enough to fall

Answer: A, droplets must grow large and heavy enough to fall. A cloud is a collection of tiny water droplets, ice crystals, or both suspended in air. These particles may be so small that air currents keep them aloft. For rainfall, they must grow through collision and coalescence or through ice-crystal processes until gravity can pull them downward. Some clouds contain moisture but produce no rain reaching the ground because the particles remain too small or evaporate while falling. B is wrong because many clouds do contain water or ice, although their amount and form vary. C is wrong because clouds are not rocks. D is wrong because clouds are closely involved in precipitation. Cue: cloud means suspended particles; rain means particles large enough to fall.

Related tags

CloudsRainfallDroplet GrowthClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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