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What colour does frost usually appear?

Answer and explanation

Correct answer: White

Correct answer: C, white. Frost is made of many small ice crystals deposited on a surface after sufficiently cold conditions. These crystals have many faces and reflect or scatter incoming light in different directions. To our eyes, the collection of crystals usually appears as a white, powdery, or icy layer. C is correct because white is the usual visible appearance of frost. A is wrong because frost is not normally black; a dark surface underneath may make the contrast stronger, but it does not change the frost’s usual colour. B and D are wrong because blue and red are not the standard appearance of ordinary frost. The colour clue should be used together with the physical clue: frost is a cold, frozen deposit on a surface. Do not confuse it with dew, which generally appears as transparent liquid droplets and may simply make a surface look wet. Memory cue: frost leaves a white icy coat; dew leaves clear wet drops.

Related tags

FrostWhite ColourIce CrystalsDewForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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