This activity accompanies reading and discussions in an introductory chemistry or physical science course. Changes of state are physical changes. Although water and ice look different, they are the same kind of matter. Water can be frozen and then melted again. Melting, freezing, vaporization, condensation and sublimation are all physical changes.
Picture Right: This ring stand set up holds the talking thermometer safely above the items that are hot. An additional ring could be added to hold the beaker.