1. Intro to TOXINS

2. Initial Thoughts: (6 min)
What systems are affected by storm water run-off?
How are you affected by this same pollution?     
How does pollution enter our body system?

3. Class Agenda TODAY’s PLAN: Today’s TaSK:
EQ: What happens to the “Stuff” that enters the water system through storm water run-off? LT: Ask questions and define problems using systems thinking. SC: Develop a water toxin/pollution model to help predict the affects on people in our community
Working in teams of 4
Research what pollutants are in our watershed.
Identify our water test results so far.
Exit ticket: how do toxins enter our cells?

4. Is it a big deal? (5 min)
Write a “Position Driven” Claim For The questions to help me debate my neighbor.
My neighbor refuses to recycle. They say it is a waste of their time?
My other neighbor insists on using pesticides and weed killer to keep their perfect yard.
My kids hate cleaning up dog poop in the winter. Can’t they just wait until it stops raining to pick it up?
The new housing developer wants to cut down a big patch of trees on the top of the hill. That’s okay right?

5. What happens to toxins in our water?
Intro to Sammy the Salmon. Video
Stop video at 1:15 minutes!!!!

6. Look at this model and make a T-chart: (5 min). What do you know
Look at this model and make a T-chart: (5 min) What do you know? What do you need to know?

7. Ammonia, Nitrite, Nitrate, pH
JIGSAW RESEARCH
Assign each group member a specific toxin or condition:
Ammonia, Nitrite, Nitrate, pH
2. Use the next slides to conduct research and become experts on your topic
3. Prepare to teach each other
4. You’re only allowed to find other resources after you have searched mine properly.

8. This Photo by Unknown Author is licensed under CC BY-SA

9. What does ammonia measure and where does it come from?
When a fish poops, it rots in the water and produces Ammonia. The ammonia is invisible, and the only way of detecting it is by using test kits. If your water is sparkling clear, it does not mean that it is safe for fish. Uneaten food can also produce lots of Ammonia. Ammonia is not safe for fish. It will poison them to death.
But in a closed area like an aquarium, how can it be safe to keep fish in?

11. What does nitrite measure and where does it come from?
Nitrite is just as poisonous as Ammonia, maybe even more. As I said earlier, the first batch of bacteria eat Ammonia. Their waste is called Nitrite. Now the second batch of bacteria eats the Nitrite and produces Nitrate in return. These two colonies of bacteria are both housed in your filter pad. We test for Nitrite to make sure our fish are safe from it and to know that the first colony of bacteria is ready.

12. Good bacteria
bad
This Photo by Unknown Author is licensed under CC BY-SA

13. What does nitrate measure and where does it come from?
Nitrate is safe for fish. But it still builds up since there is no more bacteria to eat it. If the Nitrate level is above 40 ppm (Parts Per Million) it is still unsafe for fish. So to remove it you do water changes or add live plants! Replacing Nitrate filled water with new water dilutes the remaining Nitrate. That’s why we do water changes weekly. More Ammonia put into the cycle comes out to be more Nitrate. What comes in must come out.
This Photo by Unknown Author is licensed under CC BY-SA

14. Good bacteria
Ammonia
Nitrite
New batch bacteria
Nitrate
Nitrite

15. What does pH measure and where does it come from?
A failing pH can be an indication of excess ammonia and/or nitrite resulting from a dead organism, decaying food or plants within the system; it could also be linked to a deficiency of calcium, magnesium or alkalinity. Each of these conditions either produces acids, or is an indication of a mineral imbalance that is harmful to aquarium organisms.

16. This Photo by Unknown Author is licensed under CC BY-NC-ND

17. What are our water tests missing?
This Photo by Unknown Author is licensed under CC BY-SA

18. What effects might our water quality have on salmon
What effects might our water quality have on salmon? Video: run-off from Lake Washington

19. Exit ticket: Fast Finisher: Predict how toxins enter our cells?
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