Water

From greatest to least, rank the primary uses of fresh water around the world.

• personal, industry, agriculture
• industry, agriculture, personal
• agriculture, industry, personal
• industry, personal, agriculture

In the United States, most of the fresh water we use—about 74 percent of it—comes from

• surface water sources.
• aquatic supplies.
• aquifers.
• the ocean.

Groundwater is primarily used for

• industrial uses.
• irrigation.
• personal uses.
• drinking water.

Human activities that clear large areas of land and increase erosion contribute directly to what type of pollution?

• biological
• groundwater
• sediment
• toxic chemical

The best way to reduce groundwater pollution is to

• increase the use of groundwater mining.
• prevent it from happening.
• build more desalination plants.
• speed up the eutrophication process.

Which of the following was not part of the Clean Water Act?

• set standards for pollution levels
• funded construction of sewage treatment plants
• limited the release of point-source pollution
• regulated the amount of fertilizers and pesticides that are contained in runoff

As a natural resource, freshwater is

• renewable.
• nonrenewable.
• unlimited.
• unusable.

All of the land area that supplies water to a particular river system is included in a(n)

• aquifer.
• water table.
• watershed.
• recharge zone.

Sometimes, the water table naturally rises to the surface creating

• aquifers.
• wells.
• drainage basins.
• springs.

Which major category of water use would include watering grain to feed to livestock?

• personal
• agricultural
• industrial
• electrical