TEAM+D

1.)Hypothesis- If the pond water is filtered in a funnel and put under a short UV light for 4 minutes, then it will be cleaner and safer to drink than the water that was untouched.

2.)Procedure- 1- First, take one piece of quantitative filter paper and fold it so that it fits around the inside of a 3 inch by 3 inch funnel. 2- Take the funnel while the filter paper is in it and put in the ring stand so that it sits at 10 inches off the table. 3- Next, place a 50 mL beaker directly below the bottom of the 3 inch by 3 inch funnel. 4- After that, Gather 20 mL of pond water using a pipit. 5- Put the water using a piper into the funnel so that it filters into the 50 mL beaker. 6- There should only be 20 mL in the 50 mL beaker.

7- Move the 20 mL of filtered pond water into a petri dish and place the petri dish directly under a short UV light for 4 minutes. 8- Take the separate samples of both and put them on 2 separate agar plates. 3.)Data- The UV exposed water had much less bacteria than the original Pond Water. This was the amount of bacteria left over after 3 days in the pitri dish.