Students learn to observe, describe and classify different kinds of materials. Students will analyze data obtained from testing different materials to determine which materials have the properties that are best suited for an intended purpose. Students will construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot. Science Topics:What Material Makes Something Bounce?What Materials Change with Heat?What Properties of Materials are Best Suited for an Intended Purpose?What Observable Properties Help to Classify Different Materials?