Ecology & the Environment

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Across
  1. 1. ____________ plowing creates ridges of soil across slopes
  2. 4. the energy produced by heat from Earth’s interior
  3. 6. organic matter from plants and from animal waste that contains chemical energy
  4. 10. this means protecting land from being damaged or changes
  5. 17. the removal of trees and other vegetation from an area
  6. 20. main component of natural gas
  7. 21. any natural material that is used by humans
  8. 23. water _________ is the availability of water
  9. 25. during ____________, the nuclei of radioactive atoms are split into two or more fragments
  10. 26. a fan moves by converting electrical energy to ____________ energy
  11. 27. electrical energy produced by moving water is called _____________ energy
  12. 29. crop __________ is when crops with different needs are planted in alternating seasons
  13. 30. a tiny particle of solid that is suspended in air or water
  14. 31. a natural resource that can be replaced at the same rate at which it is consumed
Down
  1. 2. the process by which a damaged land area is returned to nearly the condition it was in before people used it
  2. 3. the protection and wise use of natural resources
  3. 5. natural resources used to generate energy
  4. 7. a natural resource that forms much more slowly than it is consumed
  5. 8. the most common nuclear fuel is _________________
  6. 9. natural resources that are used to make objects, food, or drink
  7. 11. energy released when the nuclei of atoms are split or combined
  8. 12. pollution that comes from one specific site
  9. 13. the process of planting trees to reestablish forestland
  10. 14. the careful and responsible management of resources
  11. 15. an increase in the amount of nutrients in water
  12. 16. when urbanization occurs at the edge of a city or town
  13. 18. the process by which land becomes more desertlike and unable to support life
  14. 19. this forms when ground-level ozone and vehicle exhaust react in the presence of sunlight
  15. 22. water _________ is a measure of how clean or polluted water is
  16. 24. land ________ is the process by which human activity and natural resources damage land to the point that it can no longer support the local ecosystem
  17. 28. the fossil fuel most widely used for generating electrical power