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Build a catapult that transforms the potential energy of a twisted rubber band into kinetic energy. Experiment with design variations so that you can hit a target with a projectile.

In this chemistry challenge, learners systematically investigate which combination of four solutions produces a deep red color.

In this activity, learners mix ingredients in a plastic bag, and then identify three characteristics of a chemical reaction: production of heat, color change, and production of a gas.

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