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In which condition can frost damage crops in fields?

Answer and explanation

Correct answer: Surface cooling below freezing

Direct answer: B, when the surface cools below the freezing point. Frost forms when the temperature of a surface and the nearby air falls low enough for water to deposit or freeze as ice crystals. Plant tissues contain water, so freezing conditions can injure their cells and damage leaves, flowers, and young crops. A is wrong because a warm, humid morning does not normally provide the freezing condition required for frost. C is wrong because a hot wind generally raises drying and does not create frost. D is wrong because continuous sunshine warms the surface and usually removes frost rather than forming it. Do not confuse dew with frost: dew is liquid water deposited when the surface is cool but generally above freezing, whereas frost consists of ice when the surface is at or below freezing. Memory cue: dew is wet; frost is frozen.

Related tags

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

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