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Study Guide Answers

1.     What is the natural process by which gases in the atmosphere trap heat?
     the Greenhouse Effect
2.     Without the Greenhouse Effect, the earth would be extremely [hot/ cold]
     cold
3.     What are the major "greenhouse gases"?
     chlorofluorocarbons, water vapor, carbon dioxide, methane, nitrous oxide, ozone
4.     When did "greenhouse gases" begin to be released into the atmosphere in large amounts?
     during the Industrial Revolution
5.     With the exception of ______________________________, "greenhouse gases" occur naturally.
     chlorofluorocarbons
6.     When plants convert sunlight into energy that sustains them, what process is taking place?
     photosynthesis
7.     What "greenhouse gas" is removed from the atmosphere by plants?
     carbon dioxide
8.     Why is extensive deforestation a problem?
     Fewer trees exist to remove carbon dioxide and to release oxygen.
9.     Where does methane occur naturally?
     in swamps
10.     _____________________________ is released into the atmosphere when organic waste decomposes.
     Methane
11.     Methane in the atmosphere has more than __________________________________ during the last two centuries.
     doubled
12.     What "greenhouse gas" is produced during the industrial production of nylon?
     nitrous oxide
13.     Which traps more heat - nitrous oxide or methane?
     nitrous oxide
14.     By t he year 2100, global temperatures may increase between ____________ and __________ degrees.
     three/ eight
15.     Drastic global warming could trigger a rise in __________________________________.
     sea levels
16.     What is "El Niņo"?
     A phenomenon that occurs when the ocean waters of the equatorial Pacific are warmer than usual.
17.     What is "La Niņa"?
     A phenomenon that occurs when the ocean waters of the equatorial Pacific are colder than usual.
18.     What country releases more "greenhouse gases" than any other?
     the USA
19.     The concentration of "greenhouse gases" already in our atmosphere will affect global climate for at least how long?
     one hundred years
20.     What is the "Kyoto Protocol"?
     an agreement to reduce "greenhouse gas" emissions, signed by dozens of nations
21.     Why must we find alternatives to fossil fuels?
     Burning these fuels releases huge amounts of carbon into the atmosphere.
22.     What are some viable alternatives to the use of fossil fuels?
     nuclear power, solar power, wind power, hydroelectric power
23.     Newer appliances are more energy-efficient than older appliances are. True or false?
     true
© Educational Video Network, Inc. 2005 - www.evndirect.com
Your leading source for curriculum-based educational videos and DVDs.