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Unit 7

7.9 MC Answers and Review

5 min read•december 21, 2021

AP Environmental Science ♻️

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Answers and Review for Multiple Choice Practice on Atmospheric Pollution

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Fires release large amounts of carbon and particulates into the atmosphere.

⛔STOP!⛔ Before you look at the answers make sure you gave this practice quiz a try so you can assess your understanding of the concepts covered in unit 1. Click here for the practice questions: AP Environmental Science Unit 7 Multiple Choice Questions.

Facts about the test: The AP Environmental Science exam has 80 multiple choice questions and you will be given 1 hour 30 minutes to complete the section. That means it should take you around 17 minutes to complete 15 questions.

*The following questions were not written by CollegeBoard and although they cover information outlined in the AP Environmental Science Course and Exam Description the formatting on the exam may be different.

1. Which of the following is a secondary pollutant that is a major contributing factor of photochemical smog?

A. O3

B. NO2

C. CO2

D. SO2

Answer: NO2, CO2, and SO2 are all primary pollutants. Meaning that they are released directly from their source to the atmosphere.

📄 Study AP Environmental Science, Unit 7.1 Introduction to Air Pollution

2. ___ form as a result of a chemical reaction occurring in the atmosphere.

A. Primary air pollutants

B. Secondary air pollutants

C. Point source air pollutants

D. Diffuse source air pollutants

Answer: Secondary air pollutants are formed from the combination of primary air pollutants in the atmosphere.

📄 Study AP Environmental Science, Unit 7.1 Introduction to Air Pollution

3. ___ occur(s) when a layer of warm traps a layer of cold air.

A. Heat island effect

B. Acid deposition

C. Rain shadow

D. Thermal inversions

Answer: A thermal inversion is when a pocket of cold air is trapped, usually above a city surrounded by mountains. This often traps polluted air around the city.

📄 Study AP Environmental Science, Unit 7.3: Thermal Inversion

4. Building materials often contribute all of the following indoor air pollutants except,

A. VOCs

B. Lead

C. Ozone

D. Particulates

Answer: Ozone is created in the troposphere from the combustion of fossil fuels and sunlight.

📄 Study AP Environmental Science, Unit 7.1 Introduction to Air Pollution

5. The primary anthropogenic contributor to acid deposition is

A. Internal combustion engines

B. Coal-burning power plants

C. Volcanic eruptions

D. Decomposition of organic matter

Answer: Volcanic eruptions and decomposition of organic matter are not anthropogenic or man-made. Although internal combustion engines generate nitrous oxides they do not contribute to acid deposition as much as coal-burning plants.

📄 Study AP Environmental Science, Unit 7.7: Acid Rain

6. Which of the following is not a likely consequence of acid deposition?

A. Buildings and sculptures made of limestone will dissolve.

B. Aquatic organisms will perish as acid collects in pools of water.

C. Coming in contact with rainfall will cause burns to the skin.

D. Plants will not be able to tolerate drops in soil pH.

Answer: The pH level in the rain will likely not be great enough to cause burns with limited exposure like being out in the rain.

📄 Study AP Environmental Science, Unit 7.7: Acid Rain

7. Scientists took samples of rainfall in 4 locations. Identify the sample with the most acidic rain.

A. Sample 1: pH 4

B. Sample 1: pH 6

C. Sample 1: pH 9

D. Sample 1: pH 11

Answer: A lower pH means a stronger acid.

📄 Study AP Environmental Science, Unit 7.7: Acid Rain

8. This type of pollution is most likely to harm animals that rely on echolocation

A. Primary air pollutants

B. Secondary air pollutants

C. Noise pollution

D. Tropospheric ozone

Answer: Noise pollution would directly harm animals that are using echolocation by disorientating them.

📄 Study AP Environmental Science, Unit 7.8: Noise Pollution

9. Which of the following set greenhouse gas emission standards?

A. Clean Air Act

B. Lacey Act

C. Montreal Protocol

D. Kyoto Protocol

Answer: The Kyoto protocol was only partially successful because not every country agreed to abide by the greenhouse gas standards.

📄 Study AP Environmental Science, Unit 7.6: Reduction of Air Pollutants

10. Which of the following set regulations to reduce CFCs?

A. Clean Air Act

B. Lacey Act

C. Montreal Protocol

D. Kyoto Protocol

Answer: Countries widely joined and accepted the ban on CFCs and as a result, this was highly successful in reducing global impact.

📄 Study AP Environmental Science, Unit 7.6: Reduction of Air Pollutants

11. This device prevents gas fumes from entering the atmosphere.

A. CAFE standards

B. Scrubbers

C. Catalytic Converter

D. Vapor recovery nozzle

Answer: A vapor recovery nozzle allows gas fumes to be covered back into the system when fueling a car.

📄 Study AP Environmental Science, Unit 7.6: Reduction of Air Pollutants

12. The Clean Air Act did which of the following?

A. Set emission standards for cars and limit the release of pollutants.

B. Sets greenhouse gas emissions reduction standards.

C. Phased out the use of CFCs.

D. Set max contamination levels for drinking water.

Answer: The clean air act sets emission standards for cars and limits the release of pollutants.

📄 Study AP Environmental Science, Unit 7.6: Reduction of Air Pollutants

13. A catalytic converter is used to

A. Prevent pollutants from exiting while fueling an engine.

B. Reduce the total amount of fuel it takes to drive a car.

C. Prevent pollutants from exiting internal combustion engines.

D. Reduce the amount of fuel that is lost from a leaking engine.

Answer: Catalytic converts change CO, NOX and hydrocarbons to CO2, N2, O2 and H2O

📄 Study AP Environmental Science, Unit 7.6: Reduction of Air Pollutants

14. Which of the following conditions would create higher levels of smog in a city?

A. A lot of factories and low temperatures.

B. A lot of factories and high temperatures.

C. A lot of cars and low temperatures.

D. A lot of cars and high temperatures.

Answer: Smog is created from the reaction of primary pollutants generated by cars reacting with sunlight. This reaction happens faster in warm areas.

📄 Study AP Environmental Science, Unit 7.2 Photochemical Smog

15. Wind farms, sonar, construction, and cars are all sources of

A. Tropospheric ozone

B. Noise pollution

C. Primary air pollutants

D. Secondary air pollutants

Answer: All of the options have in common that they produce a lot of noise.

📄 Study AP Environmental Science, Unit 7.8: Noise Pollution

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