Summary Make/eat snack foods and discover the state changes and chemical reactions in them. Science content Chemistry: States of Matter, Properties of Materials (K-7) Chemistry: Atoms, Molecules (3-7) Chemistry: Physical Changes, Solutions, Mixtures and Separating (2, 4, 5, 6) Chemistry: Chemical Changes (2, 7) Activities in this lesson States of matter: acting them out Popcorn Soda drink Ice cream Sour candy chemistry Procedure To introduce molecules, optionally act out the states of matter with the students, so that they are familiar with what happens on the molecular level in a state of matter change. Show them each state in water as they move from one state to the next and back. Make a snack that involves changing liquid water into a gas: popcorn. While it is heating up, act out what is happening to the water inside the kernal as the water evaporates (liquid to gas) - students can divide into groups and make skits about what is happening to the molecules. Make a gas by a chemical reaction to make a soda drink. Make ice cream and discover the state changes that makes it. Using baking soda, predict how sour candies are, then taste them to check! Also see the buttered popcorn lesson. Grades taught Gr K Gr 1 Gr 2 Gr 3 Gr 5 Gr 6 Gr 7
