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If the surface is below freezing point, what is more likely to form instead of liquid dew?

Answer and explanation

Correct answer: Frost

Correct answer: D, frost. Dew is liquid water, so it normally forms when a cool surface reaches the dew point but remains above freezing. When the surface is below the freezing point, water vapour can deposit directly as solid ice crystals, producing frost. D is correct because frost is the frozen counterpart of dew under below-freezing conditions. A and B are incorrect because mist and fog are collections of tiny droplets suspended in air; they are not the usual name for ice crystals coating a surface. C is incorrect because rain is precipitation falling from clouds and is not the expected replacement for dew caused simply by a freezing surface. Memory cue: above freezing gives dew; below freezing favours frost.

Related tags

FrostFreezing PointDewIce CrystalsForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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