Hypothesis
If cotton balls, a spoon, a sponge, and dish soap are used, then 90% of the oil will be contained and 75% of the oil will be absorbed.
Independent variable: The materials that contain and absorb the oil (spoon, sponge, soap, and cotton balls)
Dependent variable: The percentage of oil that is contained/absorbed
Control variables: The amount of water, the amount of oil, the amount of dish soap, the number of cotton balls
Independent variable: The materials that contain and absorb the oil (spoon, sponge, soap, and cotton balls)
Dependent variable: The percentage of oil that is contained/absorbed
Control variables: The amount of water, the amount of oil, the amount of dish soap, the number of cotton balls