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Why is salinity higher in salt lakes?

Answer and explanation

Correct answer: Because evaporation leaves salts behind

Direct answer: D, because evaporation leaves salts behind. Water in a lake can evaporate under heat, while dissolved salts generally do not evaporate with the water. Step by step, water enters the lake carrying small amounts of dissolved minerals; sunlight and dry conditions remove some water as vapour; the salts remain in the lake; if evaporation continues and fresh water does not dilute it, the salt concentration rises. Option A is wrong because the presence or absence of fish does not explain salinity. Option B is wrong because salt lakes are not necessarily glacial. Option C is the opposite of the real process: evaporation does occur and is an important cause. Memory cue: “Water goes up as vapour; salt stays down.”

Related tags

Salt LakesEvaporationSalinityLake WaterLakesDrainageGeographyClass 9 Mcq

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