AP Enviro Crossword Puzzle

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Across
  1. 4. The area of land that provides water to a system
  2. 7. Water that flows over land and collects
  3. 13. Permanently frozen soil
  4. 14. use, and adapted traits
  5. 15. A chemical that hurts an individual's health
  6. 17. Matter fundamental for the growth and reproduction of organisms
  7. 18. A kind of tree that loses its leaves for the winter
  8. 19. A loose mixture of rock fragments, sand, organic material, and more
  9. 20. The number of species in an area
  10. 22. A spinning object that generates energy
  11. 24. A chemical that causes cancer
  12. 25. A group of individuals that are specialized and able to produce fertile offspring
  13. 29. Nonliving parts of an organism's environment
  14. 33. The study of how organisms interact with the environment and with each other
  15. 34. A disease causing organism
  16. 35. A well tested group of observations explaining a concept
  17. 37. An area developed and populated by humans
  18. 39. A trait/process that helps an organism respond to environmental changes
  19. 40. Collecting materials that can be broken down and reused
  20. 41. All of the factors with which an organism interacts
  21. 42. A colorless, unstable, toxic gas, that we need to survive
Down
  1. 1. The buildup of negative chemicals in the body
  2. 2. The transfer of energy through space
  3. 3. Able to be broken down naturally
  4. 5. A pollutant released into the atmosphere
  5. 6. Any kind of gas that traps heat in the atmosphere
  6. 8. Not to be confused with dessertification
  7. 9. The specific environment where an organism lives
  8. 10. A species that is the first to explore a new environment
  9. 11. An artificial lake where water is stored for human use
  10. 12. anything with mass that occupies space
  11. 16. A map of the steps facilitating the transfer of energy between organisms
  12. 21. Species that violently spread beyond their natural habitat are known as "_____"
  13. 23. A gradual process resulting in land being worn away
  14. 26. A liquid fossil fuel
  15. 27. A mixture of chemicals forming a grayish brownish fog
  16. 28. Any organism's specific habitat,
  17. 30. The process where one organism feeds on another
  18. 31. A long period of rest, usually in winter
  19. 32. Unwanted material produced by any organism's life process
  20. 36. Day to day conditions in Earth's atmosphere
  21. 38. A measurement of the amount of dissolved salts in a body of water