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

Build a hydrometer (measures the density of a liquid) using a pipet or eyedropper.

In this online activity, learners experience the thrill of pickle making, and explore how a cucumber becomes a pickle.