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In this online interactive simulation, learners will test the pH of liquids like coffee, spit, and soap to determine whether each is acidic, basic, or neutral.

In this engineering activity, learners test the stability of towers they build out of cups, discovering that structures with more mass in the base are more stable.

In this physics activity, learners will investigate the strength of egg shells.

In this Spanish-language chemistry activity, learners use simple materials to explore how fire extinguishers work to put out fires.