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Lesson Plan

Discover mixtures and chemical reactions through free experimentation

Freely experiment with two solids and two liquids, a pair of which make a gas. Make a soda drink by the same chemical reaction.
Science content (2016 curriculum): 
Chemistry: States of Matter, Properties of Materials (K-7)
Chemistry: Physical Changes, Solutions, Mixtures and Separating (2, 4, 5, 6)
Chemistry: Chemical Changes (2, 7)

For older students review the states of matter.
Tell students that they will mix together different liquids and solids to make mixtures.
Give them solids and liquids to mix together.
They will make many different mixtures.
Focus on the ones that make a new gas (bubbles seen) - from mixing baking soda and vinegar.
Tell students they will use the same solid, baking soda, to make a soda drink. (Skip the molecule modelling for younger primaries.)
Optional: end with elephant's toothpaste, a dramatic demonstration of a chemical reaction (oxygen bleach making oxygen gas) held in a foam mixture by the dish soap.


or follow free experimentation with other activities exploiting baking soda/acid reaction (rocket, scones - see activities in "chemical reactions with baking soda" lesson plan)

Grades taught: 
Gr K
Gr 3
Becky Evermon
Wendy Zwaagstra
Site tested: 
Selkirk Elementary
Tyee Elementary
Lesson plan originally developed and delivered: 

Tyee Elementary