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Molecular Biology Science Fair Project

The Power of Antibacterial Soap

The Power of Antibacterial Soap | Science Fair Projects | STEM Projects
Are you curious about the power of antibacterial soap? In this experiment, you will test the effectiveness of antibacterial soap against regular soap in killing bacteria.


The hypothesis is that antibacterial soap will kill more bacteria than normal soap.

Method & Materials

You will prepare petri dishes with blood agar, collect saliva, and mark chopsticks. You will then dip the chopsticks into the saliva and wash them with antibacterial and non-antibacterial soap for different lengths of time. Finally, you will measure the size of the bacteria colony growth.
You will need 4 petri dishes with blood agar, some human saliva, 4 disposable chopsticks, a ruler, antibacterial soap, non-antibacterial soap, a stopwatch, a disposable cup, and a permanent marker pen.


The results showed that the antibacterial soap was only effective in killing all the bacteria if the chopstick was washed for more than 2 minutes. The non-antibacterial soap was not as effective as the antibacterial soap. This experiment proves that antibacterial soap is more effective in killing bacteria than regular soap.

Why do this project?

This science project is interesting because it tests the effectiveness of antibacterial soap against regular soap in killing bacteria. It also shows that washing our hands with warm water and regular soap is sufficient to ward off infections.

Also Consider

Variations of this experiment include touching the petri plate with a finger instead of using saliva, and repeating the experiment under different room temperatures and/or lighting conditions.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

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