TEAM+G

Alex, Tyler, Connor 1. Hypothesis- After filtering the pond water and then exposing it to [|UV light]t for 5min then the water would be clean enough for us to safely drink. The water will be safe do drink because the light will be strong enough to kill harmful bacteria.

2. Procedure- 1a. First we filtered with a Ahlstrom quantitative filter paper filter paper 150ml of pond water. 2b. Then after that it will be put into a big flat dish. 2c. Next the pond water will be exposed to the long wave UV light with 365 nanometers. The UV light was held 5 centimeter above the dish. 2d. For safety you should not point the light at people keep the light off when not using and keep the light facing down never up.

Petri Dishes after 3 days (with UV dish #3)

Petri Dishes on day 1