1. Foul Water Lab I. Purpose: -To purify a 100ml sample of
foul water as much as possible
-To learn about “opportunity
cost” in decision-making
-To learn about municipal water
treatment

2. II. Materials/Procedure:
First, come up with a Hypothesis (what you think will be the best way to clean the water). Next, you will leave room on the front side of your lab to write out your procedure steps in such a way that an independent citizen could come in and reproduce your lab. Pictures could be helpful (and probably necessary to get full credit). You should include all materials used.

3. III. Data Table Water Quality Action Brown, stinky, floaties, oily
Water amount
at start
_______ml
Water amount
at end
____ml

4. IV. Questions
1. What was the best water cleaning method? How do you think it worked?
2. If you had a chance to repeat the lab, what would you do differently?
3. How do you think cities purify water before it is used by the public?

5. V. Conclusion Discuss the objectives.
Be sure to explain what “opportunity cost” means.