Teacher want's us to choose a negative control for this and I have no Idea.
- Set up a positive control for this experiment by spraying a paper towel with the starch solution. Allow the starch to dry for approximately one hour (this time interval may vary by local humidity).
- In the mean time, set up a negative control for this experiment. Use your knowledge of the scientific method and experimental controls to establish this component (hint: what should happen when IKI solution contacts something that does not contain starch?) Identify your negative control in Table 1.
Note: Be sure to space the positive and negative controls apart from each other to prevent cross-contamination.
the full experiment can be found here: