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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 demonstration, learners discover that nanoparticles behave differently, in part because they have a high surface area to volume ratio.

In two separate bags, learners mix water with Epsom salts and detergent.

In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.