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If moist air rises and cools, which process first helps in cloud formation?

Answer and explanation

Correct answer: Condensation

Direct answer: B, condensation. Moist air contains water vapour, an invisible gas. When that air rises, it usually expands and cools. If it cools enough to reach saturation, water vapour changes into tiny liquid droplets or ice crystals around small particles in the air. This change from gas to liquid or solid is condensation, and the collection of these particles forms a visible cloud. A, transpiration, is the release of water vapour from plant leaves; it can add moisture to the atmosphere but is not the immediate process that creates cloud droplets after cooling. C, erosion, is the wearing away and movement of earth materials. D, sediment deposition, is the settling of transported material and is unrelated to initial cloud formation. Memory cue: rising moist air cools, then vapour condenses into cloud droplets.

Related tags

CondensationCloud-FormationMoist-AirHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeography

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