GEOLOGY
HYDROGEOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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because it forms where fresh water and saltwater meet
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because it rises to the surface near the ocean
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because pollunants are filtered by rock and soil deep within Earth
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because it recieves water directly from precipitation
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Detailed explanation-1: -Answer: D. because pollutants are filtered by rock and soil deep within the earth.
Detailed explanation-2: -Almost no bacteria live in aquifers. Many pollutants are filtered out as the water passes through the soil on its way to the aquifer. There is no silty mud to cloud the water, no pollution from boaters, and no evaporation of the water supply by the sun.
Detailed explanation-3: -Aquifers naturally filter groundwater by forcing it to pass through small pores and between sediments, which helps to remove substances from the water. This natural filtration process, however, may not be enough to remove all of the contaminants. an underground layer of rock or earth that holds groundwater.
Detailed explanation-4: -As the water passes through the layers of soil (gravel and sand), it gets filtered naturally. In this process, suspended impurities and germs are removed. On the other hand, the river water during its course carries large amount of suspended impurities and microorganisms along with it.
Detailed explanation-5: -Contaminants get stuck in the soil, and clean water reaches the aquifer. Although groundwater is usually clean, soils are not perfect filters. Some contaminants still make their way through the soil and contaminate the groundwater. This is a serious problem; once polluted, it is hard to clean an aquifer.