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This is a classic exercise for visualizing the scale of the Solar System.

In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods.

This simple activity uses paper and scissors to convey two key concepts to learners: the nanoscale is very small and working on the nanoscale requires special tools.

In this physics activity, learners construct a small-scale version of a classic carnival game.

Working in groups, learners model the continuous destruction and creation of ozone (O3) molecules, which occur in the ozone layer.