Enviro Ch 15

Most of Earth's liquid fresh water is found ________.

What percentage of Earth's water is found in lakes?

Which of the following is true?

Only about 2.5% of all the water on our planet is fresh water, and ________.

Precipitation that falls on Earth's surface ________.

One-fifth of Earth's total freshwater supply is in ________.

An artesian aquifer occurs where ________.

Humans use more fresh water for ________ than for any other purpose.

Which of the following best describes a floodplain?

We build dams to ________.

Dam removal in this country ________.

Data indicate that the present rate of freshwater consumption in most developed countries is ________.

Why was the irrigation of Soviet cotton farming operations a problem?

Sinkholes result from ________.

Which of the following will contribute to water conservation?

Gray water can ________.

Which of the following is one of the major pollutants of groundwater?

The fish in the lake at the local park are dying. A professor from the local college comes to investigate, and first she measures the dissolved oxygen because she wants to check for the ________.

A watershed is ________.

"Blue-baby" syndrome is a consequence of excess ________ in the water supply.

Which of the following has contributed to aquifer contamination?

A key characteristic of aquatic dead zones is ________.

Which of the following would be the initial ecological consequence of falling water tables?

A septic system is ________.

In a municipal wastewater treatment plant, the primary treatment step includes ________.

Much of the "biosolids" material that is the end product of a wastewater treatment plant is ________.

The Colorado River's water resource allocation is being complicated by ________.

A recent study has revealed that chlorinated hydrocarbons, gasoline, and other volatile organic compounds (VOCs) have become significant pollutants in ________ from ________.

Overpumping groundwater in coastal areas can cause ________ to move into aquifers, making the water undrinkable.

Xeriscaping can save water by ________.

Recent research that analyzed the content of commercial bottled water indicates that ________.

Methods for desalinating sea water to produce fresh water include ________.

Artificial wetlands ________.

Sinkholes can occur when ________.

Sinkholes are an extreme and rapid form of ________.

A serious problem that results from excessive water withdrawn from aquifers is that ________.

One reasonable way to prevent sinkholes might be to ________.

In July 2001, the town of Spring Hill, Florida, about 45 miles north of Tampa, had 18 sinkholes appear in a single day. The largest holes were nearly 100 feet deep. This is an indication that ________.