Environmental Final Exam

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Across
  1. 5. Process of burning fossil fuels
  2. 7. Smoke and Fog mixed together
  3. 11. Layer of the atmosphere that experiences weather
  4. 12. Replanting of trees in an area
  5. 15. Chemical or biological substance used to prevent pests
  6. 17. Energy that comes from heat within Earth
  7. 18. Break down of dead organisms, returns carbon back into the soil
  8. 19. Process of removing O2 from the atmosphere and returning CO2
  9. 22. A type of hydroelectric energy that relies on gravitational pulls from the moon
  10. 23. A type of renewable energy that uses crops and other living organisms
  11. 24. The layer that is considered outerspace
  12. 26. Agricultural practice of planting one crop
  13. 27. A type of nuclear energy that splits uranium
  14. 30. Process of converting nitrates back into nitrogen gas
  15. 32. Adding water to crops
  16. 34. A type atom that is used for nuclear energy
  17. 35. Removal of trees in an area
  18. 37. Process where earth becomes warmer due to abundance of greenhouse gases
  19. 38. Ability to withstand pesticides
  20. 39. Energy source that is quickly and easily replenished
  21. 40. Agricultural practice of planting multiple crops
  22. 41. Layer of the atmosphere that contains ozone
Down
  1. 1. A type of tree harvesting that is the worst for the environment but economically cheap
  2. 2. A type of nuclear energy that occurs only on the Sun with extremely hot temperatures
  3. 3. The coldest layer of the atmosphere
  4. 4. Buildup of toxins like DDT as you progress up a trophic level
  5. 6. Energy source that is NOT easily replenished
  6. 8. Energy that uses UV rays
  7. 9. Process of removing CO2 from the atmosphere and replacing it with O2
  8. 10. Abundance of phosphorous in water ways
  9. 13. Process where soil is removed
  10. 14. Unusually high water temperatures lead to this
  11. 16. Process where soil becomes dry and infertile
  12. 20. Genetically Modified organism
  13. 21. The hottest layer of the atmosphere
  14. 25. Trees grow at different rates, typically after selective cutting
  15. 28. Bottom most layer of the soil horizon
  16. 29. Land that can be used to grow crops
  17. 31. Form of air pollution that contains nitric and sulfuric acid, causes a drop in pH
  18. 33. The protective layer inside the stratosphere that shields us from UV rays
  19. 36. Agricultural practice of harvesting aquatic organisms