A. analysis of ice cores
B. analysis of fossils
C. analysis of pollen
D. analysis of tree rings
2. What do many scientists believe contributed to the extinction of the dinosaurs?
A. predators
B.asteroid impact
C.plate tectonics
D.global warming
3. Which of the following may lead to the breakdown of the ozone layer in the stratosphere?
A.methane
B.chlorofluorocarbons
C.oxygen
D.carbon dioxide
4. Which of the following statements about the greenhouse effect is true?
A.All greenhouse gases are harmful.
B.The greenhouse effect is caused by human activity.
C.Life on earth is suffering because of the greenhouse effect.
D.Life on earth would not exist without the greenhouse effect.
5. Why are areas along the west coast of California cooler than you would expect for their latitude?
A.cold ocean current travels along the coast.
B.These areas are at higher altitudes.
C.These areas are far from a large body of water.
D.A warm ocean current travels along the coast.
6. When analyzing tree rings, what do scientists assume a thin ring indicates?
A.a year that was cool or dry
B.a year that was warm or wet
C.a year that was wet or cool
D.a year that was warm or dry
7. What happens to the incoming solar radiation after it is reflected off the surface of the earth?
A.The wavelength is longer.
B.The wavelength is shorter.
C..It speeds up.
D.It slows down.
8. In addition to temperature, what other factor is taken into consideration to classify climatic regions?
A.ocean currents
B.distance from bodies of water
C.precipitation
D.altitude
9. Which term describes what meteorologists are studying if they are studying the change in a region’s precipitation over a 20-year period?
A.weather
B.pollution
C.climate
D.resources
