The hypothesis is that Lever 2000 will be the most effective soap at killing bacteria.

You will rub your finger along the surface of a clean agar dish, incubate it overnight, and then smear it on another clean agar dish. You will then punch holes in filter paper to make small paper disks, dip them into the liquid antibacterial soap, and place them into the smeared agar dish. You will then place the dishes into the incubator and measure the diameter of the clear agar that surrounds the disk after 24 hours.

You will need agar dishes, an incubator, a Bunsen burner, filter paper, a hole puncher, tweezers and a wire loop, three types of antibacterial liquid soaps, and a ruler.

After observing the dishes for seven days, it was found that Lever 2000 was the most effective soap of the three. The effectiveness of the soaps remained constant throughout the three trials.

This science project is interesting because it allows us to compare the effects of different commercially advertised antibacterial soaps on bacteria.

Experiment variations to consider include testing bar soaps instead of liquid soaps, and testing different types of bacteria.