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Ocean acidification is a problem that humans will have to deal with as we release more and more carbon dioxide into the atmosphere.

By making models of light waves with paper, learners can understand why different colors appear in bubbles.

In this activity, learners imitate the way vocal cords work by building a model from a plastic cup, rubber band, and a straw.

In this activity (located on page 2), learners will construct tiny model geysers out of film canisters, warm water, and antacid seltzer tablets.

In this activity (on pages 20-23 of PDF), learners build a model of a power plant using simple materials.