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What is the main analytical difference between relative humidity and absolute humidity?

Answer and explanation

Correct answer: Relative humidity gives a ratio to capacity while absolute humidity gives the actual amount

Direct answer: A. Absolute humidity refers to the actual mass of water vapour present in a given volume of air, commonly expressed as a mass per unit volume. Relative humidity compares the water vapour actually present with the maximum amount the air could hold at the same temperature, and expresses that comparison as a percentage. Because warm air can hold more vapour than cold air, relative humidity can change when temperature changes even if the actual vapour amount remains similar. A is correct because it separates amount from capacity-based comparison. B is wrong because humidity is not a measure of wind direction. C is wrong because rainfall is falling liquid or solid water, not a measure of atmospheric moisture. D is wrong because absolute humidity is an amount, not a percentage fixed at 100. Memory cue: absolute means actual amount; relative means actual amount compared with capacity.

Related tags

Absolute HumidityRelative HumidityHumidity DefinitionsTemperatureHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeography

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