7. Which selection is true about Point-Source Pollution?

A. The pollution is not in water

B. You can identify exactly where the pollution is coming from

C. You cannot identify where the pollution is coming from

D. Pollutants came from living things

8. Which of these factors can increase land pollution?

A. Throwing paper cups and forks in an recycle bin

B. Throwing plastic bags and paper around the playground

C. Collecting trash from around the gym

D. Planting vegetables using manures.

9. All are natural sources of air pollution except,________________________.

A. volcanic eruption

C. forest fires

B. decay of plants

D. burning of fossil fuels

10. ___________ results from the accident or leaks, run-off from streets, improper

lubricating oil from machines or automobiles crankcase, intentional oil

discharges that occurs during the loading and unloading of tankers.

A. Sewage treatment

C. Oil Spill

B. Water Incineration

D. Persistent Substances

11. What is the source of chlorofluorocarbons?

A. aerosol sprays foams

B. exhaust fumes of motor vehicles

C. incomplete burning of wood

D. none of above

.

12. Pollution sources fall into two categories:

A. biotic and abiotic

B. point source and nonpoint source

C. renewable and nonrenewable

D. natural and man-made

13. Which human activity would be most likely to have a negative impact on the

environment?

A. Planting trees to control soil erosion

B. Limiting the use of chemicals that kill weeds.

C. Stopping the draining of swamps.

D. Burning coal and oil to generate electric power.

14. Where do almost all pollutants eventually end up?

A. in rivers

B. in the ocean

C. in the air

D. in landfills

15. Primary pollutants : carbon dioxide :: secondary pollutants: ________________

A. particulates

C. oxides from sulfur

B. ozone

D. hydrocarbons​