Particle Model of Solids, Liquids, and Gases

Display the arrangement of molecules in solids, liquids, and gases. Demonstrate how the addition of heat energy results in greater molecular motion and therefore a change of phase. Give examples of heat conductors and insulators, and then conclude with various situations for viewers to analyze. Have them identify conductors and insulators in the drawings and decide whether or not to put a coat on a snowman. Excellent for upper elementary physical science classes!