My science fair project is "what things remove bacteria the best". My hypothesis is peroxide will remove bacteria the best because usually after 20 seconds the bacteria is gone.

The experiment: what I did was in the morning I swiped my front teeth and the gums with a swab and we rubbed the agar in the petri dish with it. Then I brushed my teeth with toothpaste and did another petri dish.

The next day I again took a bacteria sample from the front teeth and rinsed with peroxide for 20 seconds.

On the third day I again put my teeth bacteria in a petri dish and I rinsed with water only.
Here is the picture of what I got a few days later.

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