This experiment was done to find out if leaving baby food out of the refrigerator after it has been opened will result in bacterial contamination.
For this experiment, the independent variable is the type of baby food (chicken vs. pumpkin vs. apple) and the amount of time the food is left out the refrigerator. The dependent variable is the rate of growth of the bacteria colony. This is determined by measuring the size of the colony using a ruler. The constants (control variables) are the room temperature, the brand of each type of baby food, the amount of sunlight exposure and the ingredients used in the preparation of the petri dish agar. The petri dish prepared with the blood agar must be stored in .....
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