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During a Glacial Period, what is the effect on the balance of the global water cycle?

Answer and explanation

Correct answer: Sea level drops as water is locked up as ice

Correct answer: B, sea level drops because much water becomes ice. During a glacial period, large continental ice sheets and glaciers grow. They store water on land that would otherwise be present in the oceans. Therefore, the amount of liquid water in the oceans decreases and the average global sea level falls. The water has not disappeared; it has temporarily shifted from the ocean to the frozen part of the hydrological cycle. A is wrong because ocean volume generally decreases, not increases. C is not the defining effect: evaporation may vary with temperature, but it does not explain the major sea-level change. D is physically impossible under glacial conditions. Memory cue: ice stored on land means less water in the sea.

Related tags

Glacial-PeriodSea-LevelHydrological-CycleHydrological CycleThe Living WorldBiologyClass 11 Mcq

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