Final Study Guide #4

12345678910111213141516171819
Across
  1. 2. occurs when water vapor cools down in the atmosphere and creates precipitation
  2. 5. the first organism to grow after a disturbance
  3. 6. process that cycles necessary elements through the air, land, and organisms
  4. 7. relationship where one hunts to kill the other
  5. 8. cycle without an atmospheric portion
  6. 9. succession that begins in a virtually uninhabited area
  7. 10. a type of pioneer species
  8. 12. breakdown of dead or decaying matter
  9. 14. a type of erosion that occurs on rocks
  10. 15. any agent that releases pollutants into the atmosphere, land, or water
  11. 17. a relationship where both organisms benefit
  12. 18. burning fossil fuels
  13. 19. relationship where one organism benefits and the other is unharmed when two or more organisms use the same resource
Down
  1. 1. when atmospheric nitrogen is fixed into a form the plants can absorb
  2. 3. cycle that uses bacteria to carry out most of the processes
  3. 4. heating of water that changes water from a liquid into a vapor/gas
  4. 7. rain, sleet, snow, and hail
  5. 11. relationship where one benefits and the other is harmed
  6. 13. when two or more organisms use the same resource
  7. 16. succession that occurs after a disturbance; fire, flood, abandoned farmland