9.12 MC Answers and Review

5 min readdecember 21, 2021

AP Environmental Science ♻️

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Answers and Review for Multiple Choice Practice on Global Change


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Large mammals are particularly susceptible to population loss and extinction.

⛔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 9. Click here for the practice questions: AP Environmental Science Unit 9 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 chemical is not considered a greenhouse gas?
A. Nitrogen
B. Methane
C. Ozone
Answer: Nitrogen is the most abundant chemical in the troposphere but it doesn't have significant thermal retention properties and is not a greenhouse gas.
📄 Study AP Environmental Science, Unit 9.3: The Greenhouse Effect

2. The type of energy that is trapped by greenhouse gasses is
A. Visible light
B. Ultraviolet light
C. Gamma radiation
D. Infrared radiation
Answer: Heat is typically radiated back into space in the form of infrared radiation.
📄 Study AP Environmental Science, Unit 9.3: The Greenhouse Effect

3. Of the following gases, which has the greatest GWP
A. Methane
C. Nitrous Oxide
D. Water vapor
Answer: CFCs global warming potential is 1,600 times more than CO2, Methane is 25 and NO is 300
📄 Study AP Environmental Science, Unit 9.3: The Greenhouse Effect

4. What type of gas has the greatest overall impact on increasing global temperatures?
A. Methane
C. Carbon Dioxide
D. Nitrogen
Answer: Carbon Dioxide has the greatest impact because of the total amount that has been introduced.
📄 Study AP Environmental Science, Unit 9.4 Increases in the Greenhouse Gases

5. Which of the following agreements lead to the reduction of CFC production
A. Montreal Protocol
B. Kyoto Protocol
C. Stockholm Convention
D. The IWC
Answer: The montreal protocol was a successful agreement among countries to limit the production of CFCs.
📄 Study AP Environmental Science, Unit 9.2 Reducing Ozone Depletion

6. Which of the following is an organization that was developed to monitor climate change?
Answer: The IPCC stands for the Intergovernmental Panel on Climate Change.
📄 Study AP Environmental Science, Unit 9.5: Global Climate Change

7. Of the following, which generates the most CO2 to produce the same amount of energy?
A. Coal
B. Oil
C. Natural Gas
D. Nuclear
Answer: Coal is considered the worst polluter of all fossil fuels as it generates the most CO2 as well as other detrimental gases.
📄 Study AP Environmental Science, Unit 9.4 Increases in the Greenhouse Gases

8. Which of the following is considered an indirect source of methane caused by human lead climate change?
A. Increasing factory farming of cattle
B. Sea level change flooding wetlands
C. Droughts creating large wildfires.
D. Melting of the permafrost
Answer: Melting of the permafrost creates a positive feedback loop for climate change by then allowing more methane to enter the atmosphere.
📄 Study AP Environmental Science, Unit 9.5: Global Climate Change

9. An organism that is able to live in a non-native environment and reproduce rapidly is known as
A. Invasive
B. Keystone
C. Endangered
D. Regulating
Answer: Invasive species are able to live successful in an environment that they were introduced to.
📄 Study AP Environmental Science, Unit 9.8 Invasive Species

10. Invasive species tend to be
A. Generalist and K selected
B. Generalist and r selected
C. Specialist and K selected
D. Specialist and r selected
Answer: Generalist are better suited to adapting to new environments and r selected organisms are able to reproduce rapidly given adequate resources.
📄 Study AP Environmental Science, Unit 9.8 Invasive Species

11. According to the IUCN what group of organisms has the highest percentage of species that are threatened or endangered?
A. Amphibians
B. Plants
C. Fish
D. Reptiles
Answer: Amphibians are often known as indicator species as they are easily impacted by environmental change or pollution.Of these groups they are by far the most impacted.
📄 Study AP Environmental Science, Unit 9.9 Endangered Species

12. Coral bleaching is most directly caused by
A. Increased plastic particulates
B. Trawl nets
C. Increasing ocean temperatures
D. Loss of apex predators
Answer: Increasing ocean temperatures cause coral to lose their algae and turn white or to bleach.
📄 Study AP Environmental Science, Unit 9.7 Ocean Acidification

13. Which of the following organisms has the greatest potential of becoming invasive? A. Moose
B. Salmon
C. Koalas
D. Goats
Answer: The other examples need specific living conditions while a goat is fairly adaptable and able to eat almost anything.
📄 Study AP Environmental Science, Unit 9.8 Invasive Species

14. Around what percentage of assessed species are being threatened with significant loss of their population and potential extinction?
A. 10%
B. 25%
C. 50%
D. 90%
Answer: Around 25% of all species are threatened or endangered,
📄 Study AP Environmental Science, Unit 9.9 Endangered Species

15. Which of the following is not a leading cause of loss of biodiversity?
A. Habitat destruction
B. Climate change
C. Pollution
D. Reduction in resource consumption.
Answer: Reducing resource consumption would conserve land and slow the loss of biodiversity.
📄 Study AP Environmental Science, Unit 9.10 Human Impacts on Biodiversity
What can we help you do now?
🤝Connect with other students studying AP Environmental Science with Hours
Browse Study Guides By Unit
🏜Unit 1 – The Living World: Ecosystems
🐠Unit 2 – The Living World: Biodiversity
👪Unit 3 – Populations
🌏Unit 4 – Earth Systems & Resources
🏖Unit 5 – Land & Water Use
⚡️Unit 6 – Energy Resources & Consumption
💨Unit 7 – Atmospheric Pollution
♻️Unit 8 – Aquatic & Terrestrial Pollution
🔥Unit 9 – Global Change
🧐Multiple Choice Questions (MCQs)
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📆Big Reviews: Finals & Exam Prep

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