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In this activity, learners make models representing bones on Earth and bones that have been in space. They discover what happens to bones without proper exercise and nutrition.

In this activity, learners work in pairs to measure each other's ankles with lengths of string.

This interactive demonstration reintroduces learners to three states of matter (solid, liquid, gas), and introduces them to a fourth state of matter, plasma.

In this activity, learners explore in what ways the shape of the land and the pull of gravity influence how water moves over Earth.