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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 investigate the different salinity levels of oceans, rivers and estuaries.

In this activity, learners discuss the different salinities of oceans, rivers and estuaries.

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

In this activity, learners compare water pressure at different depths. Learners discover that water pressure increases with depth.

An estuary is a body of water that is created when freshwater from rivers and streams flows into the saltwater of an ocean.

In this archaeology activity, learners make observations and conduct an experiment to demonstrate the effect saltwater has on artifacts.

In the wild, small crustaceans known as brine shrimp live in marine habitats such as saltwater lakes.