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In this activity, learners determine the shape of an unseen object by bouncing a ball off the object.

In this activity (on page 1), learners role play as atoms to explore how atoms can be rearranged to make different materials.

In this activity, learners use marshmallows and gum drops to construct seven models of molecules. Learners classify (solid, liquid or gas) and draw diagrams of the molecules.

In this introductory activity, learners discover that sugar and food coloring dissolve in water but neither dissolves in oil.

In this lesson, learners cut paper into very small pieces to explore the small size of quarks, the smallest thing we know of on Earth.