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On what type of night is frost more likely?

Answer and explanation

Correct answer: A very cold night

Correct answer: A, a very cold night. Frost forms when the exposed surface becomes cold enough for water to exist as ice crystals, generally at or below the freezing point. A clear, calm night can increase surface cooling, and if sufficient moisture is present, water vapour may deposit as solid ice on plants or the ground. A is correct because severe cooling is essential for frost. B is wrong because a very hot night keeps surfaces too warm for ice crystals to form. C is wrong because dry, hot winds do not provide the cold conditions needed for freezing; moving air may also hinder the quiet surface cooling that often supports frost. D is not a scientific weather condition and clearly cannot produce ice. Remember that frost requires both suitable moisture and freezing or near-freezing surface temperatures; cold alone is not always enough if the air is completely dry.

Related tags

FrostCold NightFreezingIce CrystalsForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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