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Why does rain not occur in mist and fog despite the presence of water droplets?

Answer and explanation

Correct answer: Droplets remain very small and do not grow to falling size

Correct answer: A. Mist and fog contain real water droplets, but these droplets are extremely small and light. Air resistance and upward or turbulent air movement can keep them suspended, while their weight is not sufficient for them to fall as ordinary rain. For precipitation to reach the ground, droplets or ice particles generally need to grow through processes such as collision and coalescence, becoming large enough that gravity overcomes the surrounding air resistance. A is correct because it identifies the small size and lack of sufficient growth. B is wrong because fog droplets are made of liquid water. C is wrong because gravity acts near the ground; it simply does not make such tiny droplets fall rapidly. D is wrong because droplets do not turn into stones. Memory cue: fog has suspended micro-droplets; rain has droplets large enough to fall.

Related tags

MistFogDroplet GrowthPrecipitationForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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