Environmental Science Final Review

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Across
  1. 3. Water leaves the atmosphere and returns to the Earth in this process
  2. 7. Animals that obtain their energy by eating other animals
  3. 10. In Africa, grasslands are known by this name
  4. 12. The first organism in every food chain
  5. 13. A genetic change in a species or population that occurs over many generations
  6. 14. A process by which nutrients, particularly phosphorus and nitrogen, concentrate in a body of water
  7. 15. Organisms that cause decay by breaking down organic compounds into simpler molecules
  8. 18. The day-to-day conditions of Earth's atmosphere at a particular time and place
  9. 19. An organism that captures, kills, and eats another organism
  10. 21. The burning of these returns carbon dioxide to the atmosphere (2 words)
  11. 23. A cold and largely treeless biome
  12. 25. This family of molecules is destroying the ozone layer
  13. 26. A collection of all the organisms that live in a particular place together with their nonliving environment
  14. 27. A molecule composed of three atoms of oxygen
  15. 28. All living things in an environment
Down
  1. 1. A combination of farming, overgrazing and drought has turned some productive areas of the world into deserts. This process is called?
  2. 2. Forms of precipitation having a pH below 7 (2 words)
  3. 4. All of the members of a single species that live in an area
  4. 5. The loss of forests
  5. 6. This type of forest is a nonrenewable resource
  6. 8. A species that has a broad niche-it can tolerate a range of conditions and use a variety of resources
  7. 9. A close and permanent relationship between two different species
  8. 11. Raising of aquatic animals for human consumption
  9. 12. This term is used to describe the organisms that are the first to colonize an area (2 words)
  10. 16. A mixture of chemicals in the air that appears as a haze in the atmosphere
  11. 17. This process removes carbon dioxide from the atmosphere
  12. 20. Animals that obtain energy by eating both plants and animals
  13. 22. levels Each step in a food chain
  14. 24. In North America, grasslands are known by this name
  15. 26. The scientific study of interactions between organisms and the environment