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

As a model of acid rain, learners water plants with three different solutions: water only, vinegar only, vinegar-water mixture.

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.

This lab activity is about toxic substances like pesticides and their effects on biological systems. The activity starts with an introduction of how birds sequester calcium to make an egg.

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.