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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 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.