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If air cools to the dew point, what may begin?

Answer and explanation

Correct answer: Condensation

Direct answer: B, condensation. The dew point is the temperature at which air becomes saturated with water vapour under the relevant conditions. If the air cools to that temperature, it cannot hold additional vapour as easily, and water vapour may begin changing into tiny liquid droplets. This process is condensation. Depending on where cooling occurs and whether suitable surfaces or particles are present, it can contribute to dew, fog, or cloud formation. Option A is wrong because desert formation is a long-term geographical process, not the immediate result of reaching the dew point. Option B is correct. Option C is wrong because earthquakes result from movements within Earth’s crust. Option D is wrong because reaching the dew point does not by itself require wind direction to change. Memory cue: dew point reached means saturation; saturation may start condensation.

Related tags

Dew PointCondensationSaturationWater VapourHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeography

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