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Study Guide Answers

1.     The innermost layer of the atmosphere is the ____________________________ (stratosphere/ troposphere).
     troposphere
2.     Which two gases compose 99 percent of the innermost layer of the atmosphere? _________________________________ ________________________________
     nitrogen, oxygen
3.     Name a natural source of air pollution. __________________________________________
     dust, smoke, or volcanoes
4.     Developing countries are usually sources of ______________________ (primary / secondary) air pollution.
     primary
5.     What is the major source of lead pollution in the atmosphere? _____________ _______________ ______________________
     motor vehicle emissions
6.     Gray-air smog is another name for __________________________________ (industrial/ photochemical) smog.
     industrial smog
7.     Photochemical smog is a form of ______________________ (primary/ secondary) air pollution.
     secondary
8.     Cities are greater sources of air pollution and suffer more than rural areas. True or false?
     True
9.     When a layer of warm air prevents cooler air below it from rising, the condition is known as a(n) __________________ ____________________________ .
     terminal inversion
10.     What is the smoggiest city in the United States? __________________________
     Los Angeles
11.     Tall smokestacks that can spew pollutants above an inversion layer serve mainly to relocate and reconstruct the nature of air pollution. True or false?
     True
12.     How serious is air pollution in your environment? What are major sources of pollution in your area? __________________________________________________________________________
     Various answers will be given.
13.     What, if anything, would you like to see done to alleviate air pollution? _________________________________________________________
     Various answers will be given.
© Educational Video Network, Inc. 2005 - www.evndirect.com
Your leading source for curriculum-based educational videos and DVDs.