Build a calorimeter and measure the energy content of foods containing dominant macromolecules (carbohydrates vs. lipids) and then relate the results to energy storage.
Supports PASCO's Agricultural Science Starter Lab Station:
pasco.com/product/eb-6336
Find this activity's free student and teacher files here in PASCO's Experiment Library:
www.pasco.com/resources/lab-experiments/417