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Learners smell balloons filled with different scents to guess what's inside. From this, they infer the presence and motion of scented molecules.

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.

In this experiment, learners will conduct chemical and physical tests to identify mystery substances.

This guide outlines how to plant a garden even if you don't have a yard!