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In this activity (on pages 20-23 of PDF), learners build a model of a power plant using simple materials.

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

This activity (on pages 19-24) introduces learners to the rain forest's layers—emergent, canopy, understory, and forest floor—and has learners make paper lianas (vines that live attached to trees) and

In this activity, learners build one or more edible coral polyps and place them together to form a colony.

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