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

In this investigation learners explore the differences between, and interdependence of, living and nonliving elements in a water ecosystem.

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

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.