Use examples to illustrate a physical change in matter. Elicit a definition from the examples. Refer to yesterday's chemical reaction and discuss the physical change which accompanied the chemical reaction. Discuss the 3 phases of water from ice to steam, and the energy change needed.
Initiate a problem to determine the actual number of grams of product formed when the grams of reactants are given and one of the concentration of products is listed.
Introduce mixtures and elicit a definition. Use examples and classify mixtures into homogenous and heterogenous.
Demonstrate liquid mixtures, both homogenous and heterogenous and introduce the terms suspension and emulsion, showing examples of each.