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Why can dew droplets dry quickly after strong wind begins?

Answer and explanation

Correct answer: Wind removes moist layer near surface and increases evaporation

Direct answer: A is correct. Dew is liquid water that has condensed on a cool surface. When strong wind starts, it mixes the thin, humid layer of air touching the surface with drier air above or nearby. This maintains a vapour-pressure difference between the wet droplets and the air, so water molecules leave the droplets more readily; evaporation therefore increases. Wind does not itself destroy water, but it removes humid air and replaces it with air that can accept more water vapour. A is correct because it describes this removal of the moist boundary layer and the resulting faster evaporation. B is wrong because wind cannot turn ordinary dew into rock. C is wrong because wind does not remove the Sun; sunlight and air movement are separate processes. D is wrong because wind does not make air pressure zero. Memory cue: moving air usually speeds evaporation, while still, humid air slows it.

Related tags

DewWindEvaporationHumidityForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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