Water Quality NR2

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Across
  1. 4. Cloudiness of the water.
  2. 7. type of urban pollution that involves waste decomposing or decaying in the water.
  3. 8. involves returning water heated by an industrial process to a stream.
  4. 9. water that can be used for drinking.
  5. 11. introduction of contaminants into the water supply at an identifiable location.
  6. 12. an electronic instrument used to determine turbidity.
  7. 13. round disk used to determine the turbidity of water.
  8. 15. bacteria that are always present in the digestive tracts of animals, including humans, and are found in their wastes.
  9. 19. pollution not associated with human activity.
Down
  1. 1. pollution source that originates directly from industry.
  2. 2. introduction of contaminants into the water supply over a wide area.
  3. 3. organisms that live in streams and rivers, lack a backbone and can be seen by the naked eye.
  4. 5. bottom dwelling organisms.
  5. 6. involves roadway chemicals, dumps, landfills, and sewage.
  6. 10. occurs when nitrate and phosphates from fertilizers get into ponds and streams over enriching them.
  7. 14. the amount of oxygen in the water available to fish.
  8. 16. type of urban pollution that includes medical by-products and nuclear power waste.
  9. 17. type of urban pollution common in the manufacturing of soaps, detergents, paint, and fertilizer.
  10. 18. standard method for determining dissolved oxygen rates in water.