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