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Which is the most prominent dynamic factor affecting the rate of evaporation during the hydrological cycle in summer?

Answer and explanation

Correct answer: Wind speed and replacement by drier air

Correct answer: B. Evaporation is faster when moving air carries water vapor away from a wet surface and replaces humid air with drier air. This maintains a vapor-pressure gradient, allowing more water molecules to escape from the liquid surface. Summer warmth supplies energy, but the question asks for the prominent dynamic factor, meaning an air-motion factor; wind speed is the best choice. A can influence evaporation because pressure affects vapor behavior, but it is not the dynamic factor emphasized here. C affects infiltration and water retention more directly than the atmospheric removal of vapor. D acts continuously but does not normally determine daily evaporation rate in this way. The phrase “air deflection” is not needed: the useful idea is ventilation or replacement of saturated air by drier air. Memory cue: wind removes wet air, so evaporation continues.

Related tags

EvaporationWind-SpeedSummer-Water-CycleHydrological CycleThe Living WorldBiologyClass 11 Mcq

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