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In this activity, learners discover that as the salinity of water increases, the density increases as well. Learners prove this by attempting to float fresh eggs in saltwater and freshwater.

In this activity, learners explore how salt water freezes in comparison to fresh water.

In this activity, learners explore how acids can dissolve eggshells leaving behind a membrane-covered bouncy egg.

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

Investigate the interaction of liquids of different densities and experiment with wave patterns with this hands-on activity.

In this quick activity, learners observe how salinity and temperature affect the density of water, to better understand the Great Ocean Conveyor.

In this simulation activity, learners observe what can happen when ocean waves churn up water and oil from an oil spill.

In this quick activity, learners observe how wind creates ocean currents.

In this activity, learners interact with whale artifacts such as replicas of skulls, bones, teeth, and baleen (hair-like plates that form a feeding filter).

In this activity, learners act as water molecules and travel through parts of the water cycle to discover that it is more complex than just water moving from the ground to the atmosphere.

In this activity, learners will explore how density is affected by temperature and how that can create currents.

In this activity about camouflage, learners create a model that shows how a flounder is able to blend into a variety of environments.