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In this activity, learners examine baking powder, a combination of three powders: baking soda, cream of tartar, and cornstarch.

In this online interactive simulation, learners will test the pH of liquids like coffee, spit, and soap to determine whether each is acidic, basic, or neutral.

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

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.