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20 True/False questions

  1. When atmospheric CO2 dissolves in seawater, it forms ________.stratosphere


  2. Explosive volcanic eruptions can act to ________ global temperatures.lower


  3. Increased levels of atmospheric CO2 will ultimately ________ the pH of global oceans.10 and 23 cm


  4. Melting of permafrost will release ________ as a result of decomposing vegetation.10 and 23 cm


  5. Sea level has risen between ________ over the last 100 years.10 and 23 cm


  6. Fifty percent of Earth's atmosphere is found below an altitude of ________.5.6 km


  7. Some scientists believe that these huge magnetic storms are responsible for variations in temperature and precipitation.sunspots


  8. A general term for particulate matter found in the atmosphere is ________.aerosols


  9. Burning which of the following materials contributes carbon dioxide to Earth's atmosphere?A, B, and C


  10. Global warming is likely to have a greater adverse effect on ________ regions.polar


  11. As you ascend in elevation within the troposphere, the air temperature decreases ________.6.5 ºC/km


  12. The increase in global temperature during the twentieth century was approximately ________.0.8°C


  13. Methane (CH4), nitrous oxide (N2O), and chlorofluorocarbons (CFCs) are considered ________ (greenhouse) gases.albedo


  14. A surface's ________ is the amount of total radiation that it reflects.10 and 23 cm


  15. If Earth's atmosphere contained no greenhouse gases, the average surface temperature would be ________.carbonic acid


  16. Ozone is concentrated in the ________.A and B


  17. Eccentricity, obliquity, and precession are considered to be causes of ________ climate change.albedo


  18. The climate system involves the exchanges of energy and moisture that occur among the ________ spheres.five


  19. Tree rings can be used ________.stratosphere


  20. The amount of radiation reflected by a surface is termed its ________.carbonic acid