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If visibility becomes very low and tiny droplets are in air, what is it generally called?

Answer and explanation

Correct answer: Fog

Correct answer: B. Fog is a mass of very small water droplets suspended in air near the Earth’s surface. These droplets scatter light, reduce contrast, and make distant objects difficult to see; therefore, very low visibility is an important clue. Dew is different because it consists of liquid droplets deposited on a surface, such as grass or leaves, rather than droplets suspended through the air. Frost is a solid deposit of ice crystals on a cold surface, not a cloud of liquid droplets. Dry air contains little moisture and cannot normally produce this condition. Option A is wrong because dew is surface moisture. Option B is correct because suspended droplets together with greatly reduced visibility describe fog. Option C is wrong because frost is solid ice on a surface. Option D is wrong because dry air is the opposite of moist foggy air. Memory cue: droplets in air plus poor visibility = fog; droplets on a surface = dew.

Related tags

FogLow VisibilityTiny DropletsDewForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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