Summary Do two activities from the selection, to show chemical reactions. Choose food-related ones for a Chemistry of Cooking / Foods workshop. Science content Chemistry: Atoms, Molecules (3-7) Chemistry: Chemical Changes (2, 7) Activities in this lesson Baking powder chemistry Cheese Soda drink Hydrogen peroxide chemistry Elephant's toothpaste Rocket powered by baking soda and vinegar Carbonate precipitation Procedure Pair two activities for a lesson. Include molecule models for older primaries and up. A chemical reaction happens when we see a new product: a new state of matter (e.g. gas bubbles or a solid precipitating), or a new colour or smell. Grades taught Gr K Gr 1 Gr 2 Gr 3 Gr 4 Gr 5 Gr 6 Gr 7
