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DSST Environmental Science Exam Practice Test 2
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Avg score: 56% Most missed: “The ozone layer is a necessary part of the atmosphere protecting Earth’s surface…”
DSST Environmental Science exam covers the basics of ecological concepts, environmental impacts and conservation. The exam contains 100 questions to be answered in 2 hours. Exam content briefly: 1. Ecological Concepts – 30% a. Ecosystems b. Organism Relationships c. Biodiversity d. Trophic relationships (e.g. food chain; food web) e. Energy flows and cycles f. Biomes g. Population biology h. Evolution i. Ecological succession 2. Environmental Impacts – 25% a. Human population dynamics b. Global climate change c. Pollution – physical, chemical, and biological aspects d.... Show more
DSST Environmental Science Exam Practice Test 2
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25 Questions

1. What percent of the world’s electrical power comes from nonrenewable energy sources and nuclear energy?
2. Organisms that obtain nutrition at all trophic levels are
3. Which of the following concepts is frequently used in environmental risk assessment?
4. Which of the following is indicative of a high genetic diversity in a given population?
5. Mass production contributed most to which major environmental concern?
6. Mycorrhizal fungi live among plant roots, increasing nutrient and water access for the plants in exchange for carbohydrates. Such a relationship is best described as
7. A primary goal of the Superfund is to
8. Which of the following gases is thought to be a major contributor to the effect of global climate change?
9. Which of the following is an essential practice in maintaining good soil quality for farming?
10. Which of the following are among the first organisms that may appear in secondary succession?
11. Which of the following is a possible difficulty of recycling plastics?
12. Improvements to the combustion engine have decreased which type of air pollution?
13. Which of the following is an international organization that plays a major role in environmental conservation?
14. The exploitation of minerals in oceans is controlled by the
15. Which phenomenon is necessary to keep Earth warm enough to sustain life?
16. Which of the following statements most accurately describes the role of nitrifyingfixing bacteria in the nitrogen cycle?
17. Human populations can best be described as
18. The total fertility rate of a population is the
19. In 1992,the Earth Summit aimed to develop a better integration of each country’s environmental and
20. In a temperate deciduous forest,maple trees, birds, and squirrels all live in the same given area. All three species together make up a/an
21. Degradation of ecosystems and loss of biodiversity in emerging nations is most often due to
22. Which of the following describes the method of contour farming?
23. What would the population profile look like in a country in the first stage of the demographic transition?
24. Which of the following processes provides usable energy to producers?
25. Which of the following is NOT a feature of evolution?