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In this activity, learners test to see if carbon dioxide is present in the air we breathe in and out by using a detector made from red cabbage.

Electrolysis is the breakdown of water into hydrogen and oxygen. This Exploratorium activity allows learners to visualize the process with an acid-based indicator.

In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors.

In this experiment, learners test multiple food items to see if they are an acid or base using an indicator solution created with red cabbage.

In this chemistry activity, learners will learn how to make their own pH indicator using cabbage leaves, and then test common household items with their homemade indicator.