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A white icy layer on leaves after a cold night may indicate what?

Answer and explanation

Correct answer: Frost

Correct answer: C, frost. During a cold night, leaves may lose heat and their surface temperature may fall to or below the freezing point. Water vapour then changes directly into tiny ice crystals on the leaves, or a thin layer of deposited ice develops there. This white icy coating is called frost. A is wrong because dew consists mainly of liquid water droplets on a cool surface; it is not normally a white frozen layer. B is wrong because fog consists of tiny droplets suspended in air, not a coating fixed on leaves. D is wrong in this school-level context because the described ordinary icy layer on cold leaves is identified as frost; rime is a different ice deposit associated with fog droplets freezing on exposed objects. The key clue is the combination of a cold night, a white layer, and ice. Memory cue: dew is wet, frost is frozen.

Related tags

FrostIce CrystalsDewCondensationForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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