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In this activity (on page 2 of the PDF), the learner places a golf ball between salt water and colored fresh water. The golf ball is not as dense as the saltwater.

In this activity on page 24, learners perform experiments to examine whether or not trash can float, blow around, or wash away.

In this chemistry activity, learners use spaghetti to explore density and chemical reactions.

In this chemistry activity (on page 2 of the PDF), learners make a layered drink with liquids of different densities.

Learners add different liquids (water, salt water, alcohol, and detergent solution) to water and observe the different ways the different liquids combine with water.

In this activity, learners add different liquids to water and apply their working definition of “dissolving” to their observations.