Question 1. The ozone layer in the atmosphere is able to block
infrared radiation
ultraviolet radiation
gamma rays
ultrared radiation
infraviolet radiation

Question 2. An increase in the concentration of carbon dioxide in the atmosphere is contributing to
the greenhouse effect
the ozone hole
a decrease in global temperature
an increase in animal extinction
acid rain

Question 3. In a typical ecosystem, which percentage of energy in a plant becomes available to an animal that eats the plant?
10%
20%
50%
90%
100%

Question 4. Energy and matter pass through different organisms in an ecosystem at different steps called
populations
communities
species
trophic levels
ecologic niches

Question 5. The importance of the ozone layer to Earth's inhabitants is
protection from ultraviolet rays.
to neutralize the NOx molecules in acid rain.
to prevent acid rain.
to mediate temperatures in the stratosphere.
all of these are correct.

Question 6. If the annual temperature of Washington DC warms two degrees Celsius, its climate would be most like
Minnesota.
California.
Georgia.
England.
Missouri.

Question 7. Which of the following is NOT considered to be a component of air pollution?
sulfur dioxide
nitrogen dioxide
nitrogen monoxide
carbon monoxide
nitrogen

Question 8. Which are products of burning fossil fuels in the atmosphere?
carbon dioxide and water vapor
nitrogen oxides and sulfur compounds
water vapor and sulfur compounds
carbon dioxide and hydrocarbons
all of these are correct.

Question 9. What are some ideas proposed to decrease the emissions that lead to global warming?
limit the burning of fossil fuels
strict auto emissions limits
use scrubbers to clean up coal-burning
drive more hybrid cars
all of these are correct

Question 10. Why do scientists think that global warming is occurring?
20 of the 25 warmest years in recorded history occurred since 1980
sea level is rising
glaciers are melting
1990s was the warmest decade on record
all of these are correct

Question 11. According to the equilibrium hypothesis, introducing a new species to an isolated ecosystem will
cause another species to go extinct.
cause a depletion of oxygen.
make other species stronger by increasing competition.
add to the diversity of the ecosystem
have no impact on the ecosystem.

Question 12. A food web consists of
all of the herbivores in an ecosystem
all of the carnivores in an ecosystem
all of the predators in an ecosystem
all of the prey in an ecosystem
all of the organisms in an ecosystem

Question 13. The greenhouse effect is due to the buildup of __________ in the atmosphere.
ozone
smog
carbon dioxide
oxygen
nitrogen.