Chapter 4 Crossword Review

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Across
  1. 3. Septic system that mainly treats wastewater at the tank
  2. 5. Water located in an aquifer
  3. 9. Pollution that originates from many sources
  4. 10. Silt, sediment, and even heat
  5. 11. Most common way for homes in rural areas to get drinking water
  6. 12. Disease caused by bad drinking water
  7. 15. Water that goes from a gas to a liquid
  8. 16. Type of primary wastewater treatment that uses layers of rocks or plastic
  9. 18. Layers of sand, gravel and charcoal that removes pathogens
  10. 20. Type of bacteria that needs oxygen
  11. 21. Tank used to collect heavy raw primary biosolids
  12. 22. Solids that sink to the bottom of a septic tank
  13. 23. Streams and rivers
  14. 24. Septic system that mainly treats wastewater in a leach bed
  15. 26. Loosely clumped masses of fine particles
  16. 27. Water that changes from a liquid to a gas
  17. 28. Toilet water
  18. 29. Collection of water in ponds, lakes, and oceans
  19. 30. Floating debris such as grease and oil
  20. 31. Common disinfectant used in water treatment
  21. 33. Water that evaporates from plants
  22. 34. Gentle mixing of soon to be drinking water to create flocs
  23. 35. Sink, bathtub, dishwashing and washing machine water
  24. 36. Boiling water and collecting the vapor for clean water
Down
  1. 1. Type of bacteria that doesn't require oxygen
  2. 2. Pesticides, oil and gas spills, and mining
  3. 4. Used in Activated Sludge Process to increase bacterial action
  4. 6. Chlorine, chlorine dioxide, and ozone
  5. 7. Ultraviolet light and heat
  6. 8. Adding Fluoride to public drinking water
  7. 13. Uses an aeration tank to increase bacterial action
  8. 14. Secondary step in primary wastewater treatment that collects stones and cinders
  9. 17. Pollution that comes from one identifiable source
  10. 19. Positive and negative charged particles bind together
  11. 25. Wastewater treatment stage that collects solids
  12. 30. Wastewater treatment stage that uses biological processes (such as bacteria)
  13. 32. Living organisms that cause disease