1. Explain/discuss your observations and results. For example, state whether more or fewer drops than you expected fit on the penny, and explain the reason for this.
Explain the differences that you saw before you added the dish washing liquid and after you added it. This includes comparing the speed of movement of the food coloring before and after the addition of the dish washing liquid. Why was the speed affected?
2. You will also want to address how this experiment relates to the ultimate question: What is the importance of surfactant? How does the addition of the dish washing liquid affect the interaction of the food coloring and the milk? Do the dish washing liquid and surfactant perform similar functions?
3. Address whether your data supports the hypothesis that you presented in the introduction.
4. Lastly, this experiment allowed you to observe what happens between the food coloring and milk in the absence of the dish washing liquid. Compare this to the respiratory system
– what would happen to the interaction of water and gasses if surfactant was not present?
