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Learners see that a carrot slice sinks in fresh water and floats in 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 experiment, learners float colored ice cubes in hot and cold water.

Learners act as engineers and design mini submarines that move in the water like real submarines.

In this activity, learners investigate convection by using food coloring and water of different temperatures.

In this activity, learners experiment with surface tension using everyday household items such as strawberry baskets, paperclips, liquid dish soap, and pepper.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

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