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The global transport of water through the water cycle is what kind of system with respect to matter?

Answer and explanation

Correct answer: Physically closed system

Correct answer: B, a physically closed system with respect to water on the Earth system scale. Water continually changes location and form: it evaporates, condenses, falls as precipitation, flows as runoff, enters groundwater, and is released by organisms. However, the total amount of water on Earth remains nearly constant over ordinary time scales because very little water enters or leaves the Earth system. This is why the water cycle is described as closed for matter, although energy enters mainly from the Sun and heat leaves to space. A is not the best answer for the global water budget. C is wrong because the cycle is continuous, not temporary. D is wrong because it is a natural, not artificial, system. The phrase “closed for matter” is important: it does not mean water stays in one place or that Earth exchanges no energy.

Related tags

Water CycleClosed SystemMatter And EnergyHydrological CycleThe Living WorldBiologyClass 11 Mcq

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