Effective experiment used to demonstrate the function of macromolecules from a biological perspective or to discuss joules in a chemistry course. Uses a soda can and ring stand.
The design of this document is functional for a "class set" of lab sheets, with students writing their lab reports in a science notebook or online, but can also be modified to be a fill-in-the-blank worksheet for those who prefer that route. Since this is a Word Document, you can edit as you see fit. As a teacher, to maximize time, group students and make each group responsible for one type of food with each student in the group having various responsibilities (recorder, lab materials management, designated fire-starter, etc). I always did the experiment outside to avoid the fire alarm, but also in a slightly enclosed area to block wind.