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When dew appears as an icy layer after freezing, what is it called?

Answer and explanation

Correct answer: Frost

Frost is a deposit of solid ice crystals that forms on a surface when the surface becomes cold enough, usually at or below the freezing point, and moisture in the nearby air changes directly into ice or freezes after a thin film forms. It may look like a white, icy coating on grass, leaves, windows, or metal. Dew, in contrast, is normally liquid water deposited as droplets when the surface is cool but above freezing. The visible icy layer in the question therefore indicates frost.

Option B is correct because the frozen deposit is called frost. Rainfall is liquid or falling precipitation and is not the name for an icy surface coating. Loo is a hot, dry wind, so it has no connection with freezing. Dust consists of solid soil particles rather than water ice. The key clue is the combination of a cold surface and an icy deposit, which identifies frost.

Related tags

FrostIcy DepositDew

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