Unit 6 Review

The water that people can drink is what?

• salt water

• fresh water

• surface water

• groundwater

Water is a_________ source

• non-renewable

• renewable

What percentage of Earth's surface is covered in water?

• 97%

• 77%

• 71%

• 3%

Only a small percentage of the water on Earth is liquid fresh water that humans can us.

• True

• False

What percentage of Earth's water is salt water in oceans and seas?

• 97%

• 71%

• 3%

• 20%

Of the fresh water on Earth, about 67 percent is frozen in glaciers and polar icecaps.

• True

• False

The fresh water we use mostly comes from what?

• streams and river system

• surface and groundwater

• wells and watershed

• lakes and rivers

The bodies of fresh water, salt water, ice,and snow that are found above the ground is what?

• Surface water

• watershed

• Aquifer

• River system

The area of land that is drained by a water system is what?

• aquifer

• watershed

• recharge zone

• irragation

Groundwater is water that is beneath the earth's surface.

• true

• false