Heat is a form of energy. Heat can be produced from other forms of energy such when wood or gas burns. Heat is also produced by friction when two objects or materials rub together. Heat energy causes the tiny particles of matter to vibrate or move about. The more heat that is added to the particles, the faster the particles will vibrate or move. Temperature is a measure of how fast or slowly the particles are moving. Heat is the measure of the total energy of the particles in a system. Heat energy always moves from something at a high temperature to something at a lower temperature. Heat energy can move from one place to another by means of conduction, convection or radiation. Heating and cooling both involve the movement of heat energy. Things get hotter when heat energy is added and things get colder when heat energy is taken away. Heat energy can be prevented from moving from place to place with insulation.