This science fair project was conducted to evaluate the effectiveness of using oil to retain water in soil. The science project experiment involved corn oil, sunflower oil and canola oil.
1. For this science fair project, the independent variable is the type of oil used – corn oil, sunflower oil, canola oil, or none at all. The dependent variable is the amount of water that evaporates from the soil. This is determined by using the digital weighing scale to measure the weight of the cup. The constants (control variables) are the size of the cup, the soil-to-water mix ratio, the room temperature and the amount of oil used. 2. The 20 cups are separated into 4 groups of five cups each. The groups are accordingly labeled corn oil, sunflower oil, .....
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