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Before dew forms, air reaches near which state?

Answer and explanation

Correct answer: Saturation

Answer: A, saturation. Air is saturated when it contains as much water vapour as it can hold at a particular temperature and pressure. During night-time cooling, air near a surface may approach saturation; when the surface reaches the dew point, excess water vapour condenses into dew. Complete dryness would prevent dew, so B is wrong. Volcanic and seismic states describe neither the atmospheric moisture condition nor the process, so C and D are wrong. In simple terms, cooling brings moist air closer to saturation, and reaching the dew point allows condensation. Memory cue: saturation is the “full moisture” condition before droplets appear.

Related tags

DewSaturationCondensationDew PointForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeography

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