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The direct transformation of water vapour into ice crystals on plant leaves during winter is part of which process?

Answer and explanation

Correct answer: Deposition

The correct answer is B, deposition. Deposition is the direct change of a substance from gas to solid without passing through the liquid state. When a leaf surface is below freezing, water vapour in nearby air may change directly into ice crystals, producing frost. A, evaporation, is the change from liquid water to water vapour, so it is the reverse direction. C, melting, changes a solid into a liquid and therefore also does not fit. D, percolation, is the downward movement of water through soil or porous rock. The related reverse change, from solid directly to gas, is sublimation. Do not confuse deposition with ordinary condensation: condensation changes vapour into liquid water, whereas deposition changes vapour directly into solid ice. Memory cue: gas to solid is deposition.

Related tags

DepositionFrostPhase ChangeHydrological CycleThe Living WorldBiologyClass 11 Mcq

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