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In this experiment, learners test multiple food items to see if they are an acid or base using an indicator solution created with red cabbage.

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 activity, learners simulate what happens to a human spine in space by making Sponge Spool Spines (alternating sponge pieces and spools threaded on a pipe cleaner).

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.

In this outdoor activity, learners explore UV rays from the Sun and ways to protect against these potentially harmful rays.

This is a quick activity (on page 2 of the PDF under Stained Glass Activity) about the "Tyndall effect," the scattering of visible light when it hits very small dispersed particles.

In this activity, learners model how the Moon's volcanic period reshaped its earlier features.