iris langen- chapter 14 crossword

1234567891011121314151617181920212223242526
Across
  1. 5. standard for safe drinking water
  2. 9. a dramatic change in water temperature
  3. 11. sewege treatment system used for rural homes
  4. 12. incesticide banned in 1972 for harmful effects on animals
  5. 13. water produced and contaminated by human activities
  6. 15. a ___ zone is an area with low oxygen concentration
  7. 17. undergound septic pipes below the surface
  8. 19. type of species indicating if pathogens are present
  9. 20. in eutrophication,body of water becomes rich in
  10. 21. a diffused area that produces pollution
  11. 23. non-chemical water pollution from humans
  12. 25. human-made pond to handle animal waste
  13. 26. Acids deposited on Earth as rain and snow or gases and particles
Down
  1. 1. bacteria in human intestines that serve as an indicator species
  2. 2. harmful chemicals used for rocket fuel
  3. 3. wildlife in the water
  4. 4. distinct location where pollution is produced
  5. 6. a heavy metal found in water
  6. 7. the layer of fairly clear water in a septic tank
  7. 8. supports the protection of fish,
  8. 10. water is contaminated passing through these pipes
  9. 14. increase in the fertility of water
  10. 16. chemicals that control pest organisms
  11. 18. solid waste material
  12. 22. a group of industrial compounds used to make plastics
  13. 24. found in Earth's crust, can dissolve into groundwater