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In this introductory activity and demonstration, learners are introduced to the concept that different substances react chemically in characteristic ways.

Learners investigate signs of a chemical reaction when they mix vinegar and baking soda. In addition to a gas being produced, learners also notice the temperature decreases.

In this activity, learners explore chemistry and the microbial world by making their own sourdough starter and bread at home using only flour and water.

A group of learners simulates the spread of disease by trading slips of paper, one set of which has been treated with a baking soda solution.