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In which condition will frost formation be less likely?

Answer and explanation

Correct answer: Surface is warm and air is dry

Correct answer: C. Frost needs two broad conditions: a sufficiently cold surface, usually at or below the freezing point, and a source of moisture in the nearby air. During a long, clear, cold night, a surface may lose heat by radiation and cool strongly. Moisture can then freeze as frost or deposit directly as ice crystals. A warm surface does not provide the required cold place for ice to remain, and dry air provides little water vapour for frost formation. Option A is wrong because a below-freezing surface favours frost. Option B is wrong because moisture supplies the water needed. Option C is correct because both warmth and dryness oppose frost formation. Option D is wrong because a long, cold night often encourages surface cooling. Memory cue: frost requires cold plus moisture; warmth or dryness makes it less likely.

Related tags

FrostFreezingMoistureSurface TemperatureForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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