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What change occurs to water vapour during dew formation?

Answer and explanation

Correct answer: Gas to liquid

Answer: D. During dew formation, water vapour in the air cools and changes from a gas into tiny liquid water droplets on a cool surface. This gas-to-liquid change is condensation. The surface usually cools to the dew point, allowing the air next to it to become saturated. A is evaporation, the opposite change from liquid to gas, so it does not describe dew. B is sublimation, the change from solid to gas, and is unrelated here. C is deposition, gas to solid, which is associated with frost rather than ordinary liquid dew. Memory cue: dew is liquid, so vapour changes gas → liquid; frost is ice, so vapour may change gas → solid.

Related tags

DewPhase ChangeCondensationWater VapourForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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