1. 26 27 X Food Test Experiment: Hypothesis (for unknown Sample):
Conclusion:
Known Samples
Food Sample
Observations (picture and words)
Grease Stain?
Iodide Color Change?
Nitric Acid Color Change?
Unknown Sample X 26 27

2. Procedures: Testing for Lipids
Place a small piece of 3 samples on top of a paper napkin. Leave it there for a minute.
Make an observation for each sample and write it on your chart (a picture and some words)
Move the food samples at least 2 inches above or below where you initially placed the sample.
If there is a grease stain on the napkin, we can assume the food sample(s) contains the following macromolecule: Lipids! Record on your chart (Yes or No)

3. Procedures: Testing for Carbohydrates
4. Place another small piece of all 3 samples on a paper napkin.
Place 3 drops of iodide on your food samples. If the iodide changes color, then you can assume that the food sample(s) contains the following macromolecule: Carbohydrates!
Record on your chart whether or not your sample changed color

4. Procedures: Testing for Proteins
6. Place yet another small sample of the same 3 food sample. Your co-teacher will place a drop of nitric acid on your food samples.
If the drops of nitric acid changes color, then you can assume that your sample(s) contain the following macromolecule: Proteins.
Record whether or not your sample changed color.

5. Left Side
Hypothesis: Form a hypothesis about your unknown. What kind of macromolecules do you think the unknown contains? Do you think there will be a grease stain or/and color change?

6. What is a conclusion? The final step in the scientific method.
a summary of the experiment's results
Based on your results was your hypothesis Rejected or supported? Why?