Quiz #8 - Water Resources

Water covers approximately ________ of Earth's surface.

• 50 percent

• 90 percent

• 25 percent

• 71 percent

The largest portion of fresh water today is located in

• clouds.

• groundwater resources.

• ice caps and glaciers.

• the major rivers and lakes of the world.

Which of the following is not an example of a potential surface water resource?

• artificial lakes

• aquifers

• rivers

• wetlands

Approximately what percent of the world's irrigation water is from groundwater?

• 5 percent

• 15 percent

• 25 percent

• 80 percent

Approximately what percent of the U.S. population derives a portion of its fresh water from groundwater sources?

• 10 percent

• 30 percent

• 50 percent

• 75 percent

The main source of groundwater is

• hygroscopic water in the soil.

• surface water where it intersects the zone of recharge.

• precipitation that percolates downward as gravitational water.

• outgassing from deep within Earth's interior.

The process that removes organic compounds, debris, and salinity from seawater, brackish water, and saline groundwater is known as

• consumptive use.

• desalination.

• nonconsumptive use.

• instream use.

What percentage of water on Earth is SALT WATER?

• 97.5%
• 2.5%

What percent of water on earth is FRESH WATER?

• 97.5%
• 2.5%

When water changes form from a LIQUID to a GAS?

• Condensation
• Evaporation
• Precipitation