This quiz works best with JavaScript enabled. Home > Agriculture > Environment > General > Environmental Science – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Environmental Science Quiz 21 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The variable a scientist manipulates in an experiment is called the A) Independent variable. B) Controlled variable. C) Dependent variable. D) Observation variable. Show Answer Correct Answer: A) Independent variable. 2. Contains largest percentage of Earth's water A) Atmosphere. B) Ice and snow. C) Oceans. D) Vegetation. Show Answer Correct Answer: C) Oceans. 3. Point-source pollution and non-point source pollution differ in A) The kind of biological agents causing the pollution. B) Whether the source of pollution is agricultural or industrial. C) The number of sources from which the pollution is discharged. D) None of above. Show Answer Correct Answer: C) The number of sources from which the pollution is discharged. 4. The basic support systems needed to keep an economy going, including power, communications, transportation, sanitation, and education form a country's A) Infrastructure. B) Urbanization. C) Urban geography. D) Industrialization. Show Answer Correct Answer: A) Infrastructure. 5. The purpose of ..... is to answer question s about the natural world. A) A hypothesis. B) History. C) A procedure. D) Science. Show Answer Correct Answer: D) Science. 6. Under water, photosynthesis by aquatic plants and phytoplankton is mostly limited by the amount of ..... available. A) Oxygen. B) Carbon. C) Phosphorus. D) Sunlight. Show Answer Correct Answer: D) Sunlight. 7. It refers to the removal of salt from ocean water A) Salination. B) Dam. C) Desalination. D) Reservoir. Show Answer Correct Answer: C) Desalination. 8. This law establishes testing protocols for municipal tap water A) Clean Air Act. B) Safe Drinking Water Act. C) Clean Water Act. D) Endangered Species Act. Show Answer Correct Answer: B) Safe Drinking Water Act. 9. Any inherited characteristics that increases an organisms chance of survival is a (n) ..... A) Mutation. B) Adaptation. C) Natural selection. D) Niche. Show Answer Correct Answer: B) Adaptation. 10. Matter that organisms require for their life processes are A) Producers. B) Nutrients. C) Decomposers. D) Biogeochemical cycles. Show Answer Correct Answer: B) Nutrients. 11. Public land is overgrazed by privately owned cows. This is an example of the..... A) Swapping of debt for nature. B) Rule of seventy. C) Principle of manifest destiny. D) Tragedy of the commons. Show Answer Correct Answer: D) Tragedy of the commons. 12. Which of the following pollutants is the leading cause of lung cancer in the United States? A) Mercurary. B) Lead. C) Radon. D) Copper. Show Answer Correct Answer: C) Radon. 13. The law of conservation of mass is a ..... A) Theory. B) Hypothesis. C) Principle. D) None of above. Show Answer Correct Answer: C) Principle. 14. The "triple bottom line" of sustainability includes: A) Environmental, social and economic factors. B) Architectural, engineering and financial factors. C) Human, animal and plant factors. D) All choices are correct. Show Answer Correct Answer: A) Environmental, social and economic factors. 15. What percentage of Earth's surface is covered in water? A) 50%. B) 75%. C) 90%. D) 25%. Show Answer Correct Answer: B) 75%. 16. The lithosphere is carried on a softer, but still firm, layer of rock called the A) Geosphere. B) Asthenosphre. C) Crust. D) Core. Show Answer Correct Answer: B) Asthenosphre. 17. Which of the following is true regarding food production and availability? A) There is not enough food produced in the world to adequately feed everyone. B) There is enough food produced to feed everyone, and everyone has enough food to live. C) There is more than enough food produced, but not everyone has access to adequate nutrition. D) Everyone that wants to can buy or grow enough food for themselves. Show Answer Correct Answer: C) There is more than enough food produced, but not everyone has access to adequate nutrition. 18. Which of the following energy sources is useful in most parts of the world? A) OTEC. B) Geothermal energy. C) Tidal power. D) Active solar energy. Show Answer Correct Answer: D) Active solar energy. 19. Which environmental problem is an undesirable change in an environment caused by the introduction of a substance that can harm living organisms? A) Sustainability. B) Loss of Biodiversity. C) Pollution. D) Resource Depletion. Show Answer Correct Answer: C) Pollution. 20. Watering crops by way of human-constructed structures is known as A) Fertilization. B) Salinization. C) Precipitation. D) Irrigation. Show Answer Correct Answer: D) Irrigation. 21. The United States uses which percentage of the world's fossil fuels? A) 25 percent. B) 18 percent. C) 10 percent. D) 75 percent. Show Answer Correct Answer: A) 25 percent. 22. The place where an organism lives is it's ..... A) Principal. B) Overconsumption. C) Habitat. D) Water. Show Answer Correct Answer: A) Principal. 23. Procedure used to test a hypothesis A) Hypothesis. B) Experiment. C) Observation. D) Prediction. Show Answer Correct Answer: B) Experiment. 24. Climatographs are useful tools in describing a biome's climate. They typically show patterns in annual A) Rainfall and snowfall. B) Precipitation and humidity. C) Precipitation and temperature. D) Temperature and sunlight. Show Answer Correct Answer: C) Precipitation and temperature. 25. Which of the following types of organisms experience seasonal loss of leaves as an adaptation to their climate? A) Coniferous trees. B) Grasses. C) Deciduous trees. D) Succulent plants. Show Answer Correct Answer: C) Deciduous trees. 26. What does "fitness" mean when describing an organism? A) A nonnative organism that spreads widely in a community. B) The process of selection conducted under human direction. C) A heritable trait that increases the likelihood of an individual's survival and reproduction. D) How reproductively successful an organism is in its environment. Show Answer Correct Answer: D) How reproductively successful an organism is in its environment. 27. The trapping of gases around the earth to ensure that life can exist is called A) Deforestation. B) Global warming. C) Climate change. D) Harvesting. Show Answer Correct Answer: B) Global warming. 28. In the last several hundred years, human population has ..... dramatically. A) Increased. B) Decreased. C) Stayed the same. D) None of the above. Show Answer Correct Answer: A) Increased. 29. In which part of a nuclear power plant does nuclear fission occur? A) Reactor vessel. B) Cooling tower. C) Condenser. D) Heat exchanger. Show Answer Correct Answer: A) Reactor vessel. 30. The pH of the water in several lakes in Norway and Sweden had decreased to below 5.0 due to an increase in acid rain. Which of the following is most likely to happen in these lakes? A) An increase in numbers of fish. B) The decline of several fish populations. C) Increased predator-prey relationships. D) An increase in the amount of primary producers. Show Answer Correct Answer: B) The decline of several fish populations. ← PreviousNext →Related QuizzesEnvironment QuizzesAgriculture QuizzesEnvironmental Science Quiz 1Environmental Science Quiz 2Environmental Science Quiz 3Environmental Science Quiz 4Environmental Science Quiz 5Environmental Science Quiz 6Environmental Science Quiz 7Environmental Science Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books