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In this demonstration, learners observe vinegar and baking soda reacting to form carbon dioxide (CO2) gas.

In this chemistry activity (page 6 of the PDF), learners observe a chemical change. Learners write and reveal a secret message using edible ink.

In this activity, learners perform an experiment to find out what determines a flower's color.

Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.