This lab teachers the concept of Thermal Energy transfer--by Conduction. It shows them the abstract concept that heat travels down the heat conductor, a piece of aluminum foil, from the heat source, down the foil and melts the chocolate chips in order, 1st,2nd, 3rd, accordingly. I needed to make a lab that could be used in the classroom, without an open flame, which is prohibited in our school district. This is now a class favorite, especially because they I allow them to sample the chocolate chips! Science Rocks with Smalley!