Environment keep our waters clean lab.

This product contains 2 lessons-one a lab and the second a Power Point activity which can also be utilized as a sub-plan.
Teach them together or they can stand alone

This is an easy lab to set up. Students often wonder how the lifeguard keeps the water in a pool so clean.You can use pond water or teach this one if you have leftover microorganisms from another lab. Chlorination is the most common and effective method of destroying harmful microorganisms in water. Chlorine disinfectant is usually used as sodium hypochlorite in low concentrations.

This lesson is two parts. The first is to have students observe what happens to the microorganisms when bleach is added.
The second is a research project to learn about diseases associated with poor-quality water.

Materials
Pond water or solution containing microorganisms
Bleach
Eye dropper
Microscope