Environmental Science

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Across
  1. 4. the amount of lead that is considered safe (a number)
  2. 6. protects us from UV rays in the stratosphere, but is a pollutant in the troposphere
  3. 8. a geographic area that has a common drainage location for water
  4. 9. a measure of the suspended particulates in water
  5. 10. the liquid that accumulates in landfills
  6. 13. an organism that gets impacted by bleaching
  7. 14. three of the answers to this crossword are numbers, put them in ___ order to get the code for the next lock
  8. 15. the most efficient type of irrigation
  9. 16. the number of layers in the atmosphere BELOW the thermosphere
  10. 17. practices that will allow the repeated use of resources for generations without running out
  11. 20. a species that is not native to an area and causes problems for the local ecosystem
Down
  1. 1. the non-living components of an ecosystem.
  2. 2. a type of power generated by moving water, usually in a dam
  3. 3. the chemical name for natural gas
  4. 5. a type of organism that gets its energy from the sun directly
  5. 7. the system in living organisms that regulates hormones and development
  6. 11. the type of growth demonstrated by a J-shaped curve
  7. 12. a type of extraction that obtains natural gas by fracturing the rocks
  8. 18. if the growth rate is 10 percent, then the doubling time is ___ years
  9. 19. type of soil that has a relatively even mix of sand, silt and clay