Holt Environmental Science Chapter 11 Water

Freshwater is a limited resource because ___________.

• most water is polluted

• it is controlled by powerful governments

• most surface water contains salts

• dams have limited the flow of fresh water

Tags

NGSS.MS-ESS2-4

Disease causing organisms, like bacteria and viruses, are known as ____________.

• pathogens

• forms of thermal pollution

• forms of chemical pollution

• helpful

An area above an aquifer through which water percolates down is called a _________?

• Surface water

• Recharge zone

• Potable

• Dam

Tags

NGSS.MS-ESS2-4

Which of the following is a source of nonpoint-pollution?

• unlined landfill

• runoff from agricultural feedlots

• polluted waste-water from a chemical plant

• leaking oil tanker

A single source of pollution, such as a factory, a wastewater treatment plant, or a leaking gasoline tank are examples of

• Point source pollution

• Nonpoint-source pollution

• Desalination

• Potable

Tags

NGSS.MS-ESS3-3

Water that is safe to drink is called 

• Permeable
• Sea water
• Potable
• Passable

The area of water that is drained into a river is known as a

• Flood plain

• Delta

• Surface water

• watershed

How much of Earth's water is fresh water?

• 1 percent

• 3 percent

• 77 percent

• 97 percent

Tags

NGSS.MS-ESS2-4

Which of the following activities are ways that freshwater is used?

• irrigating crops

• residential use

• industrial use

• all of these are correct

Water treatment involves removing pathogens like bacteria by

• adding mercury

• adding chlorine

• removing fluoride

• removing chlorine

Tags

NGSS.MS-PS1-2