Describe heat as the energy produced when substances burn, certain kinds of materials rub against each other, and when electricity flows through wire.
Develop an understanding that there are many forms of energy (such as heat, light, sound, and electrical) and that energy is transferable by convection, conduction, or radiation. Understand energy can be in motion, called kinetic; or it can be stored, called potential. Develop an understanding that as temperature increases, more energy is added to a system. Understand nuclear reactions in the sun produce light and heat for the Earth.
Increasing the temperature of any substance requires the addition of energy.