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Air Pollution
Multiple Choice

Select the correct response to each of the following multiple choice questions.

1 .       __________ pollutants are emitted directly from identifiable sources. 

2 .       With the passage of the federal __________ Act, as amended in 1970, major strides were made in reducing air pollution. 

3 .       Which one of the following is NOT a primary pollutant? 

4 .       The source of nearly half our pollution (by weight) is from the __________ category. 

5 .       A pH of 4 is __________ times more acidic than a pH of 5. 

6 .       The vertical distance between Earth's surface and the height to which convectional movements extend is called the __________. 

7 .       The major component of photochemical smog is __________. 

8 .       Two of the most important atmospheric conditions affecting the dispersion of pollutants are the strength of the wind and the __________ of the air. 

9 .       Which one of the following pollutants has shown the greatest percent decrease in concentration during the past years? 

10 .       This colorless, odorless, poisonous gas is the most abundant primary pollutant. 

11 .       Air pollution is likely to be most severe __________. 

12 .       The best-known effect of acid precipitation is the __________ of lakes and streams in eastern North America and Scandinavia. 

Answer choices in this exercise are randomized and will appear in a different order each time the page is loaded.

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