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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.

Get a roll of pennies, throw them on the ground, then remove those that only show tails, and repeat with the ones left over.

This paper describes a working-model demonstration of Ernest Rutherford's 1911 experiment about the nature of atoms.

In this activity, learners create a model using metric measuring tapes and atmosphere composition data.

In this activity, learners create a working model of a nail clipper. This activity helps learners learn the basic principles of simple machines, engineering design and model building.