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

Learners create a model of a wetland to observe how it absorbs and filters water from the environment.

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

Did you know that the water we use today is the same water found on Earth millions of years ago? The Earth constantly uses and recycles water in a process called the water cycle.

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

Water treatment on a large scale enables the supply of clean drinking water to communities.

In this activity, learners create a freshwater ecosystem in a large plastic bottle. Learners cut and prepare bottles, then fill with water, aquatic plants, snails and fish.