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What percentage of the total water on Earth is present as saltwater in oceans?

Answer and explanation

Correct answer: About 97%

Direct answer: B, about 97%. Most of Earth’s water is found in the oceans, and this water is salty because it contains dissolved salts. Only about 3% of Earth’s total water is freshwater, and much of that freshwater is stored in glaciers, ice caps or underground, so only a small part is readily available in rivers and lakes. A value of about 71% is commonly associated with the proportion of Earth’s surface covered by water, not the percentage of total water that is ocean saltwater. Therefore D confuses surface coverage with water distribution. Fifty percent and twenty-five percent are much too low for the ocean share. Memory cue: 71% is surface coverage; about 97% is the share of Earth’s water in oceans.

Related tags

Ocean WaterSaltwaterEarth Water DistributionFreshwaterHydrological CycleThe Living WorldBiologyClass 11 Mcq

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