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How is frost different from dew?

Answer and explanation

Correct answer: Frost forms as icy crystals

Dew and frost are both forms of moisture deposited near the ground, but their physical states are different. Dew forms when water vapour changes into liquid water droplets on a surface that has cooled sufficiently. Frost forms when the surface is cold enough for water vapour to deposit directly as solid ice crystals, or for deposited moisture to freeze. Thus, the important distinction is not the place where they appear but whether the moisture is liquid or solid. Frost generally requires temperatures at or below the freezing point at the surface.

Option B is correct because frost is seen as icy crystals. Option A describes dew more closely, since dew is made of liquid droplets. Options C and D are unrelated or false: frost is not defined by forming in the sea and it does not form only on hot days. The best way to remember the distinction is state of matter—liquid droplets for dew and solid ice crystals for frost.

Related tags

FrostDewIce Crystals

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