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What is the condition of the atmosphere when its relative humidity exceeds 100%?

Answer and explanation

Correct answer: Supersaturation

Correct answer: B, supersaturation. Relative humidity compares the actual amount of water vapour in air with the maximum amount that air can hold at the same temperature, expressed as a percentage. At 100%, the air is saturated. If the calculated relative humidity is above 100%, the air contains more vapour than the usual equilibrium capacity at that temperature; this state is called supersaturation. Such air is often unstable and may form droplets or ice when suitable condensation or ice-forming particles are present. A, saturation, describes the 100% condition, not a value above 100%. C, evaporation point, is not the name of an atmospheric humidity state. D is not the standard term for this condition; a temperature inversion is a different atmospheric arrangement. A useful caution is that supersaturation does not mean air can remain indefinitely unchanged; condensation often reduces the humidity toward saturation. Memory cue: exactly 100% equals saturated; above 100% equals supersaturated.

Related tags

Relative HumiditySupersaturationCondensationWater VapourHydrological CycleThe Living WorldBiologyClass 11 Mcq

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