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Project title Waterless urinals and hygieneFeatured science projectScience project video
Difficulty Level Elementary school
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This science fair project was done to determine if waterless urinals are more hygienic compared to the conventional water-based urinals. The experiment was done by taking bacteria samples from waterless urinals and water-based urinals to compare for variances in bacteria growth.  

Instructions preview
1. For this science fair project, the independent variable is the sample collected from the waterless urinal and the water-based urinal. The dependent variable is the amount of bacteria growth in the Petri dishes. This is determined by measuring the approximate diameter of the growth of the bacteria colony with a ruler. The constants (control variables) are room temperature, the amount of sunlight and the petri dish preparation. 2. The 10 petri dishes are filled with agar and stored in a refrigerator. The petri dishes are taken out of the refrigerator and brought to room temperature before the start .....
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