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In this activity, learners discover that atoms and ions of different metals will change places.

In this activity, learners mix ingredients in a plastic bag, and then identify three characteristics of a chemical reaction: production of heat, color change, and production of a gas.

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

This kinesthetic science demonstration introduces learners to four states of matter: solid, liquid, gas, and plasma.