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If very cold dry air is blowing over a field what will be the main limitation for frost formation?

Answer and explanation

Correct answer: Availability of water vapour

The correct answer is C: the main limitation is the availability of water vapour. Frost requires not only sufficiently low surface temperature but also moisture that can deposit or freeze on the surface. Very cold air may favour freezing, yet if it is dry, there is little water vapour available to supply ice crystals. Consequently, frost formation can be limited even when the air feels extremely cold. A is not the main limitation because wind direction alone does not determine whether moisture is present. B is not the best answer because solar energy influences heating and cooling, but the question specifically identifies dry air as the problem. D is wrong because a field surface is already present and provides a place for deposition. Memory cue: frost needs cold plus moisture; cold dry air supplies only one requirement.

Related tags

FrostDry Cold AirMoistureForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeographyClass 12 Mcq

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