Groundwater

Question 1

Human use of groundwater has _______ over time.a.increasedb.decreasedc.decreased and then increasedd.remained the same

Revolt · Accepted Answer

A

Question 2

Groundwater overdraft occurs when _______.a.the location of the water table changes due to seasonb.aquifers become pollutedc.the rate of use exceeds the rate of replenishmentd.trees are planted

Revolt · Accepted Answer

C

Question 3

What approximate percentage of the Earth’s freshwater is groundwater?a.10%b.20%c.30%d.40%

Revolt · Accepted Answer

C

Question 4

Which of the following is not a source of groundwater pollution?a.landfillsb.septic tanksc.smoke stacksd.fertilizer

Revolt · Accepted Answer

C

Question 5

Aquifers are _______.a.located below the water tableb.important sources of freshwaterc.located in the saturated zoned.all of the above

Revolt · Accepted Answer

D

Question 6

Compare the use of groundwater in preindustrial times to industrial times.

Revolt · Accepted Answer

In preindustrial times, groundwater was used mainly for small-scale domestic wells and limited irrigation. In industrial times, large-scale pumping supports cities, factories, and extensive agriculture, often exceeding recharge rates.

Question 7

What are some ways that groundwater is used in the United States currently?

Revolt · Accepted Answer

In the United States today, groundwater is used primarily for irrigation (about 70%), public drinking-water supply, and industrial and thermoelectric power uses.

Question 8

Explain the importance of groundwater as a source of freshwater.

Revolt · Accepted Answer

Groundwater is the largest reservoir of readily available freshwater on Earth; it supplies nearly half of all drinking water in the United States, supports crop irrigation, maintains stream base flow, and is a critical buffer during droughts.

Question 9

Why has groundwater use increased over time?

Revolt · Accepted Answer

Groundwater use has increased because of population growth, expanded irrigation for food production, industrial development, and the need for reliable year-round water supplies in growing urban areas.

Groundwater Answers

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