Draw six circles on paper towel or a square of brown paper. Label each circle as in Table 1 below. 3. Place a tiny drop of water in the first circle place a drop of oil in the second circle . Finally, place a drop of a food solution in each of the remaining labeled circles.
1. You did not use a color reagent to test for the presence of fats but used the "paper towel" test. What substance was used for the positive control, and what was used for the negative control? Explain the purpose of including both positive and negative controls in your experiments.