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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 measure and calculate the amount of cubic feet various containers contain. Next, learners investigate cubic feet per second (cps), by carrying jugs in one second.

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

In this guided discussion activity, learners watch a video about Central Africa's Lower Congo River, one of the most biologically diverse rivers in the world.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.