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Which of the following conditions is most suitable for frost formation?

Answer and explanation

Correct answer: Below-freezing surface and enough moisture

Direct answer: B. Frost requires two basic conditions: a sufficiently cold surface, generally at or below the freezing point, and available moisture. Water vapour can then deposit as ice crystals or freeze on the surface instead of remaining liquid. B is correct because it supplies both low temperature and moisture. A is wrong because a hot surface cannot normally support frost, and dry air provides little moisture. C is wrong because strong hot wind and dry soil oppose cooling and moisture deposition. D is wrong because tides and sea salinity are not the controlling conditions for frost on land. Frost should not be confused with dew: dew is liquid, while frost is solid ice. Memory cue: frost needs “freezing surface + moisture.”

Related tags

FrostFreezing SurfaceMoistureIce DepositionForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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