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Everybody loves bubbles, and this is the best bubble recipe ever!

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

Learners create hard water by mixing Epsom salt and water. Then they compare what happens when soap solution is mixed with hard water and regular water.

In this quick activity (page 1 of the PDF under SciGirls Activity: California Fish), learners will build a simple Cartesian Diver in an empty 2-liter bottle.

In this hands-on activity, learners determine the types of chemical reactions achieved when combining different household products.

Learners mix vinegar and baking soda to produce a gas. With the addition of a bit of liquid soap, the gas becomes trapped in measurable bubbles.