Now record the temperature of the water. The more heat an object has, the more energy it possesses. On the sun, heat is produced by nuclear energy which is radiated through space in all directions. Heat is also produced by friction, or mechanical energy, chemical energy, and electrical energy. We have learned that temperature is not the same thing as heat and they are measured in different ways.
Heat is measured by using a calorimeter and in units of either calories or British Thermal units.
Everyday we use heat in different ways. We heat our homes, schools, offices, we cook our food and run our cars, ships, and planes. This lesson addresses Instructional Objectives 2.12, 2.13, 2.14, 2.15, 2.16, 2.17, and 2.18 . Man has always known the importance of light. Years ago he had to get most of his work done during the daylight hours.