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Project title Sunlight and bacteria growth in aquatic environmentsFeatured science projectScience project video
Difficulty Level High school
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This science fair project was done to ascertain the relationship between the exposure of water to sunlight, and the amount of bacteria in the water. The science fair project experiment was performed on tap water, drain water and water from a lake. 

Instructions preview
1. For this science fair project, the independent variable is the source of water – tap, drain and lake. The dependent variable is the amount of 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 the room temperature, the amount of sunlight and method of preparation of the petri dish agar. 2. The 12 petri dishes prepared with agar are stored in a refrigerator. The petri dishes are brought to room temperature before the start of the science fair project by taking them .....
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