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Exposure of Baby food and the degree of contaminationFeatured science projectScience project video

Observation

The results show that the specimen that was left outside for 24 hours had the highest rate of bacteria growth. The specimen that was opened and left outside for 30 minutes had the second highest rate of bacterial growth and the specimen that was immediately placed in the refrigerator had the least bacterial growth. The chicken specimen had a larger bacteria colony then the pumpkin and apple specimens.

Use the graph below to plot the results of the table above. 

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Complexity level:
5
Project cost ($):
20
Time required:
1 day to prepare, 3 days for experiment
Material availability:
Easily found
Safety concerns:

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