This dialog develops the concept of heat as a scientist might develop it. It assumes that the student is familiar with temperature, as measured by thermometer, and reviews this knowledge.
The dialog proceeds through a long series of kitchen physics experiments, drawing on the experiences of students with simple situations with hot and cold water, thermos bottles, ice, water on stoves, water in thermos bottles, and other similar situations. The basic notion is to get the student to realize that temperature alone is not sufficient to explain what is happening. In many situations the changes in temperature are the same but the situations do not appear to be the same.
The notion of heat transfer evolves out of these experiments, and the dialog considers how to measure heat transfer. Conservation ideas are introduced. Mathematical details appear in later modules.