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Topics > Microbiology > Bacteriology

	Project title	Bacteria and thawing methods
	Difficulty Level	Middle school
	Project page	Click here to view this science project
Description
The aim of this science fair project is to find out which method of meat thawing leads to the least amount of bacteria contamination. This experiment is conducted by thawing the meat over the counter, in the refrigerator and using the microwave oven.
Instructions preview
1. The independent variable for this science fair project is the method of defrosting the chicken meat – at room temperature, in a refrigerator and using the microwave. The dependent variable is the size of the bacteria growth in the Petri dish. This is determined by measuring the size of the bacteria growth using a ruler. The constants (control variables) are room temperature, the amount of sunlight and the ingredients in the Petri dish agar. 2. Prepare 3 Petri dishes are prepared using agar and store themin a refrigerator. The Petri dishes are brought to room temperature before the .....

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