 | Project title | Germs, germ everywhere!  |
| Difficulty Level | Middle school | |
| Project page | Click here to view this science project | |
Description | ||
| This science fair project was done to compare the amount of germs found in the places that we touch. The testing was done by obtaining samples from the handle of a shopping trolley, computer keyboard, the button/handle of a water cooler, buttons on a lift, and a door knob. | ||
Instructions preview | ||
| 1. For this science fair project, the independent variable is the locations the swabs are wiped to sample for germs. The dependent variable is the number of bacteria colonies that grown in each petri dish. This is determined by observing and counting the bacteria colony spots. The constants (control variables) are the room temperature, the amount of sunlight and the ingredients in the petri dishes. 2. The four petri dishes are stored in a refrigerator. The petri dishes are brought to room temperature before the start of the science experiment, by taking them out of the refrigerator and allowing ..... | ||
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