Human Impact on the Environment

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Across
  1. 4. A type of species whose introduction into a new environment is harmful.
  2. 6. The sugar produced in photosynthesis
  3. 7. The act of harvesting trees and clearing forests.
  4. 8. The measure of the number of hydrogen ions in a solution.
  5. 10. A relationship between two different species.
  6. 11. The introduction of harmful materials into the environment.
  7. 13. A form of energy production from within the Earth.
  8. 15. A nonrenewable resource found beneath the surface of the Earth.
  9. 18. A layer of the Earth's atmosphere where life is found.
  10. 20. Tiny pieces of solids or liquids in the air which can be harmful to humans.
  11. 21. A change in global temperatures and weather patterns over a long time interval.
  12. 22. A layer of the Earth's atmosphere that filters harmful rays from the sun.
  13. 25. Only one of the two species benefits while the other is unaffected.
  14. 26. A type of energy production which burns coal, oil, and natural gas.
  15. 30. The limiting factor of all population sizes.
  16. 31. The act of protecting a species from becoming endangered or extinct.
  17. 32. This consumes both primary and secondary organisms.
Down
  1. 1. Carbon dioxide and water vapor are examples of this type of heat storing gas.
  2. 2. Both species benefit
  3. 3. Consumption of a population at a rate quicker than it can be replenished.
  4. 5. A resource used up at a slower rate than it takes to replenish.
  5. 9. The long-term heating of Earth's surface.
  6. 12. Deserts, tundra, grasslands, and forests are examples of this.
  7. 14. A type of air pollution which mixes with water causing pH to decrease.
  8. 16. A resource used up at a rate quicker than it can be resupplied.
  9. 17. Only one species benefits while the other is harmed, but not killed.
  10. 19. The percentage of energy passed from one trophic level to another.
  11. 23. A type of species used to assess the health of an ecosystem.
  12. 24. Another name for plants and other photosynthesizing organisms.
  13. 27. A type of consumer of a carnivorous nature.
  14. 28. A form of energy production that uses only light from the sun.
  15. 29. A type of consumer of a herbivorous nature.