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If there are icy crystals instead of liquid droplets on a surface, which form is it?

Answer and explanation

Correct answer: Frost

Correct answer: B, frost. The key observation is the physical form of the water on the surface. Dew consists of liquid water droplets that collect when a surface cools and water vapour condenses. Frost consists of solid ice crystals, usually formed when the surface temperature is at or below freezing and water vapour becomes ice. Therefore B is the only option that describes icy crystals on a surface. A is wrong because dew is liquid, not frozen. C is wrong because mist is made of tiny suspended droplets in air, not crystals settled on a surface. D is wrong because fog is also a collection of tiny droplets floating near the ground and reducing visibility. The important distinction is location and state: dew and frost settle on surfaces, while mist and fog remain suspended in air; dew is liquid, frost is solid. Memory cue: dew is wet, frost is frozen.

Related tags

FrostIce CrystalsDew DifferenceForms Of CondensationForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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