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What long-term effect will the rapid melting of mountain glaciers due to global warming have on sea levels?

Answer and explanation

Correct answer: Sea level will rise, increasing the risk of flooding in coastal areas

Correct answer: B. Mountain glaciers store water as land ice. When they melt, much of that water flows through streams and rivers into the oceans, increasing the amount of ocean water and contributing to sea-level rise. A warmer climate can also warm seawater, causing thermal expansion, so glacier melt and expansion together can raise sea level. Higher sea levels do not mean that every coast will experience exactly the same rise, because local land movement, currents, winds and ocean conditions also matter; nevertheless, the broad long-term effect is increased coastal flooding, erosion and salt-water intrusion. A is wrong because adding land-derived meltwater does not lower the ocean level. C is wrong because melting changes one stage of the water cycle but does not stop the entire cycle. D is wrong because adding fresh water does not remove all dissolved salts from the ocean. Memory cue: land ice melting adds water to the ocean; floating sea ice has a different direct effect.

Related tags

Sea-Level-RiseGlaciersGlobal-WarmingHydrological CycleThe Living WorldBiologyClass 11 Mcq

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