[Jennifer]

As part of the carbon/oxygen cycle, which process would remove carbon dioxide from the atmosphere?
a. the growing of rain forests
b. burning gasoline in automobiles
c. burning coal in power plants
d. respiration of animals
e. destruction of the ozone layer
The main source of "greenhouse" gasses is..
a. the rain forests
b. aerosol cans
c. burning of fossil fuels
d. methane from rice paddies
e. man-made fertilizers
The reaction of chemical pollutants with one another in sunlight produces
a. acid rain
b. global warming
c. less pollution
d. greenhouse gasses
e. photochemical smog
What would happen to the nitrogen cycle if all the denitrifying bacteria were destroyed?
a. the cycle would be sped up
b. the cycle would adjust to compensate for the loss of the bacteria
c. chemical reactions would replace the bacteria
d. the cycle would eventually stop
e. the cycle would keep right on going
Why is it that the chemical that actually destroys ozone is so dangerous?
a. It will always remain in the air.
b. It can recycle and destroy ozone for a long time.
c. It may be increasing the amount of global warming.
d. It can make more of itself in the air.
e. It can react to make acid rain.
Researchers often say "correlation is not necessarily cause." By this they mean that two or more events which occur at the same time may not always be related. Two events occurring at the same time does not always imply that one directly causes the other. Choose the combination of global events listed below which shows that "correlation is not necessarily cause."
a. CFC use and ozone depletion
b. CO2 levels and ozone depletion
c. photochemical smog and car exhaust
d. fossil fuels use and rising CO2 levels
e. car exhaust and acid rain