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If relative humidity is 80%, what is its most appropriate meaning?

Answer and explanation

Correct answer: The air holds 80% of its saturation capacity of water vapour

Direct answer: B. Relative humidity is calculated by comparing the actual water vapour in air with the maximum vapour the air could hold at that temperature, then expressing the ratio as a percentage. A value of 80% means the air is holding about four-fifths of its temperature-dependent saturation capacity. It does not directly state oxygen content, temperature, or a guaranteed rainfall probability. A is wrong because oxygen percentage is a different atmospheric measurement. C is wrong because relative humidity is not a rain forecast; rain also depends on uplift, cloud development, and other conditions. D is wrong because humidity percentage is not a temperature reading. B is correct. Warning: humidity percentage is a capacity comparison, not a weather certainty.

Related tags

GeographyRelative HumidityPercentageSaturationHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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