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Compared with dew formation, what is the most decisive additional condition for frost formation?

Answer and explanation

Correct answer: Surface being below freezing point

Correct answer: B. Dew and frost both require cooling and sufficient moisture, but their final products differ. Dew is liquid water deposited when a surface cools to the dew point while remaining above freezing. Frost forms when the surface temperature is below 0°C, the freezing point of water, so water vapour deposits as ice crystals or any deposited water freezes. A, strong daytime heat, does not directly provide the required below-freezing surface condition. C, a warm sea breeze usually brings warmer air and is not the decisive frost condition. D, a sudden pressure fall is not the defining requirement. The memory cue is: dew is liquid on a cool surface; frost is ice on a freezing surface.

Related tags

GeographyFrostFreezingDepositionForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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