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How does dry and warm air affect the rate of evaporation in the water cycle?

Answer and explanation

Correct answer: It significantly increases the rate

The correct answer is B: dry and warm air generally increases evaporation substantially. Evaporation occurs when liquid-water molecules gain enough energy to escape into the air. Warm air and warm surfaces provide more thermal energy, so more molecules can leave the liquid. Dry air contains relatively little water vapour, so it has a greater capacity to accept additional vapour and maintains a stronger moisture gradient above the water surface. These conditions speed evaporation. A is wrong because dryness and warmth usually do not reduce evaporation. B is correct because both factors favour faster transfer of water into the atmosphere. C is wrong because they do not stop the process. D is wrong because temperature and humidity clearly affect evaporation rate. Memory cue: warm supplies energy; dry provides space for more vapour.

Related tags

Dry-AirEvaporationHumidityHydrological CycleThe Living WorldBiologyClass 11 Mcq

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