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

Learners write their initials by applying different clear "magic ink" solutions to separate pieces of paper and then "develop" the inks with other clear solutions.

In this activity, learners explore two properties of gases: gases take up space and exert pressure. Learners assemble two flasks and a beaker, connecting them with stoppers and tubing.

This hands-on activity demonstrates how a material can act differently when it's nanometer-sized.