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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.

Create gas with a glass of water, some wire, conductors and a battery! You will be separating water (H2O) into oxygen and hydrogen.

In this outdoor activity, learners visit the intertidal zone of a rocky coastal site well populated with marine organisms.

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 physics demonstration, learners will be surprised when a lemon slice appears to magically levitate within a pint glass.