Summary Make meringues. While they are baking find out which molecules in them make the foam, and do other foam activities. Science content Chemistry: Physical Changes, Solutions, Mixtures and Separating (2, 4, 5, 6) Activities in this lesson Meringue Foam molecules Elephant's toothpaste Coke and mentos Procedure A foam is a mixture called a colloid. It is made up of gas bubble suspended in a liquid (or solid). This lesson makes some foams. Make meringues. While baking figure out which molecules in the ingredients made the foam with the foam molecule test (proteins). Then make other foams and discuss the molecules that make the foam: elephant's toothpaste, then coke and mentos. Grades taught Gr 4
