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Many people get water from a source deep underground, called groundwater.

In this activity, learners explore how engineering has developed various means to remove impurities from water.

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 ecology activity (page 8 of the PDF), learners explore how to filter contaminated water using a variety of materials.

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

Learners follow directions to construct a water-powered electrical generator using a turbine made from plastic spoons.

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