Across
- 1. plastic walls used to trap oil
- 5. area in a body of water with low amount of oxygen and organisms
- 7. oxygen quantity in a body of water over time
- 8. slightly clear layer of water in the middle of a septic tank
- 9. contamination of water
- 11. solid waste
- 13. a species that shows pollution in an environment
- 15. a factory creates this
- 16. heavy metal that is found when coal is burned
- 17. when there is a high nutrient content in a body of water
- 18. heavy metal found in the Earth's crust
- 19. slick oil that is on the oceans surface
- 20. safe drinking water standard confirmed by EPA
- 21. industrial compound that is used to make plastic
Down
- 2. lagoon filled with animal waste
- 3. underground pipes in a septic system
- 4. a certain location that produces pollution
- 6. bath water
- 10. sewage system for farms and homes
- 12. rocket fuel chemicals
- 14. pollution that was not produced from one origin
- 15. causes organisms to die because of change in water temperature