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 Elephant's toothpaste Baking soda and vinegar Rocket powered by baking soda and vinegar Soda drink Baking powder chemistry Cheese Hydrogen peroxide chemistry Carbonate precipitation Procedure Pair two or three 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. My favourite combination for primaries/lower intermediates: Elephant's toothpaste demonstration - see a new state of matter and feel the temperature change. Baking soda demonstration - see a new state of matter and feel the temperature change. Molecular modelling of baking soda and vinegar. Rocket outside or Soda drink My favourite combination for intermediates: Grades taught Gr K Gr 1 Gr 2 Gr 3 Gr 4 Gr 5 Gr 6 Gr 7
