1. Water Purification & Pollution

2. How Water Treatment Works https://www.youtube.com/watch?v=t uYB8nMFxQA https://www.youtube.com/watch?v=t uYB8nMFxQA

3. During our lab, what 4 steps in the water treatment process did we use? Aeration Coagulation Sedimentation Filtration

4. Aeration Gas bubbles escape Oxygen is added

5. Coagulation Alum is added –sticks to solid particles so that they clump together and separate from water – “floc”

6. Sedimentation Gravity pulls the floc to the bottom in settling basins

7. Filtration Remaining water is filtered through sand, pebbles

8. What is the 5 th step? Adding disinfectants to water to purify it and kill any organisms

9. How long does cardboard take to break down? 2 weeks

10. How long does it take photodegradable packaging to break down? 6 weeks

11. How long does it take newspaper to break down? 6 weeks

12. How long does it take styrofoam to break down? 80 years

13. How long does it take for aluminum to break down? 200 years

14. How long does it take plastic packaging to break down? 400 years

15. How long does it take glass to break down? Takes so long that we do not know fully

16. CHALLENGE WATER POLLUTION SCENARIOS: How do these activities lead to water pollution? 6 th Grade

17. Allowing Animals to graze directly next to a stream

18. 1) Wastes pass disease-carrying bacteria 2) prevents soil from eroding, so that water does not travel faster and further 2) Loss of riparian vegetation Plantlife that exists along a waterway Benefit: absorb pollutants before they exit downstream

19. Fields left empty after harvesting crops

20. 1) soil is looser, filled with fertilizers and pesticides, so it erodes more quickly, carrying them further

21. PowerPlants returning water that is not polluted into a river after using it to cool down machines

22. Warm water (even if not polluted) causes many organisms to die

23. Having fun on a motorboat with friends

24. *Oil and gas to keep it moving Harms wildlife Hard to get out of water *Litter can easily get into the water (marine dumping)

25. Driving a car down a highway

26. Oil and gas spills  road is impermeable, surface runoff carries it to nearby ponds/lakes/rivers Litter

27. Putting salt on the road after a snow day to make it less slippery

28. Rain carries salt to freshwater sources Can change the LAKE TURNOVER process Damages plants

29. Using cleaning products labeled “environmentally friendly” and “biodegradable”

30. Remove oxygen from the water

31. Using laundry detergents with phosphates in them

32. Phosphates are food to algae Cause Eutrophication

33. Mercury is emitted into the air by burning coal for fuel

34. Atmospheric Deposition: pollutes air, creating acid rain mercury poisoning