Across
- 2. pollution that can be traced back to a specific point
- 4. POPs are concentrated through the food chain
- 6. pollution caused by fertilizer runoff
- 7. occurs when POPs are absorbed into fatty animal tissue
- 10. used to determine the effect that a chemical or pollutant has on a living organism
- 11. pollution caused by pathogens such as bacteria and viruses
- 13. pollution caused by a change in water temperature
Down
- 1. pollution caused by loose soil, sand, silt, and clay.
- 3. pollution from a large area
- 5. pollution caused by things like Pesticides, Heavy metals and industrial solvents, oil
- 8. a graph that shows how biological oxygen demand and dissolved oxygen in the water are affected by the addition of pollution.
- 9. pollutants that do not easily break down in the environment.
- 12. the amount of a chemical that will kill 50% of the population of that organism