11. Which of the following is most damaging to the ozone layer? carbon dioxide

oxygen

chlorofluorocarbons

methane
12. Which gas is emitted through the burning of fossil fuels?

carbon dioxide

oxygen

chlorofluorocarbons

nitrous oxide
13. Which of the following has the greatest effect on climate?

greenhouse effect

ozone depletion

photosynthesis

smog
14. Which of the following is a problem caused by acid rain?

respiratory problems in humans

causes depletion of the ozone layer

makes lakes and streams unsuitable aquatic life

is a factor in global warming
15. What kinds of anthropogenic activities produce acid rain?

coal and oil power plants and automobiles

the use of refrigerants and aerosols

burning of fossil and plant fuels that produce carbon dioxide

agricultural fertilizers and methane from animal wastes
16. What is the main cause of the damage to trees on Grandfather Mountain?

methane gas from agriculture pollution

sulfur dioxide from coal fired plants in Tennessee

carbon dioxide from automobiles

nitrous oxides from automobiles
17. How is ozone different from oxygen?

Ozone is toxic, corrosive and not breathable.

Ozone is easier to breathe than normal oxygen.

Ozone only exists in the upper atmosphere.

Ozone is the same as oxygen .
18. How is stratospheric ozone created?

Ozone created from NOx and VOC gases rise from low altitudes into the stratosphere and form the ozone layer.

Radiant energy from the sun breaks apart oxygen molecules freeing single oxygen atoms that recombine into ozone.

Ozone is formed in when sulfur and nitrogen oxides combine with water in the atmosphere.

When ultraviolet radiation passes through a depleted ozone layer it acts on oxygen at ground levels creating ozone.