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What is the correct meaning of specific humidity?

Answer and explanation

Correct answer: Ratio of water vapour to total air mass

Correct answer: A. Specific humidity is the ratio of the mass of water vapour to the total mass of moist air. In simple words, it tells us how much water vapour is present in a given mass of air. The total air mass includes both dry air and water vapour, so the idea is different from measuring only cloud moisture. Specific humidity is commonly expressed as grams of water vapour per kilogram of moist air. It generally changes less directly with temperature than relative humidity because it depends mainly on the actual amount of vapour present. A is correct because it gives this air-mass relationship. B is wrong because water vapour is present throughout moist air, not only in clouds. C describes soil moisture, not atmospheric humidity. D refers to dissolved salts in seawater. Memory cue: specific humidity means “specific amount of vapour in a specific mass of air.”

Related tags

GeographySpecific HumidityAtmospheric MoistureHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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