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The effectiveness of household cleaning agents for killing bacteriaFeatured science projectScience project video

Observation

The results showed that the chopping boards cleaned with  Dettol solution and Clorox solution have the least amount of bacteria remaining on the surfaces.

Cleaning Agent

Size of bacteria growth over 5 days (mm)

Day 1

Day 2

Day 3

Day 4

Day 5

Water

0

10

22

37

48

Dishwasher

0

6

13

23

33

Dettol

0

2

5

9

13

Clorox

0

1

3

6

9

The graph below represents the results of our science project experiment.

bacteria science fair projects

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Complexity level:
7
Project cost ($):
30
Time required:
1 day to prepare, 5 days for science fair project
Material availability:
Easily found
Safety concerns:

The bacteria should be destroyed before being disposed of. Pour some bleach into the petri dish to kill all the bacteria before disposing of the dishes in the trash.