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This is a comprehensive lesson plan on page 85 for a group cleanup trip to a local beach, lake or stream. Learners keep track of the types and amounts of trash picked up and analyze this information.

In this activity, learners create a soil and water model of a single-cell life environment and study living microorganisms.

In this activity, learners explore how engineers design devices that can detect the presence of pollutants in the air.

In this activity, learners build a model of a self-sustaining habitat (growing grass and beans from seeds).