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In this activity on page 15 of the PDF, learners measure the amount of bubbles that they make using a detergent.

Learners use a commercially available toy to experiment with density. They fill a chamber in the toy submarine with baking powder and release it into a tank of water.

Each learner chews a piece of gum until it loses its flavor, and then leaves the gum to dry for several days.

In this quick activity (page 1 of PDF under SciGirls Activity: Lift Off), learners will use the ever-popular soda geyser experiment to test the reactivity of the various sugar candies or mints.