Hypothesis: Snot can be colored.
Materials: 5 year-old child, water-based (thank goodness) marker
Procedure: 1. Child is too quiet in her room. 2. She colors the insides of both nostrils with a blue marker. 3. Allow time for nose to run.
Observation: Blue mucus ran out her nose for several minutes.
Conclusion: Yes, snot can be colored.
Note to future scientists: This research was only conducted on liquids. Additional experiments need to be conducted to determine if this procedure will work with solids.
