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In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.

Learners will build and experiment with their own windmills made from simple household materials.

In this activity on page 7 of the PDF (Water in Our World), learners make their own water treatment systems for cleaning water.

In this field study, learners discover how to collect data in the field and how their efforts can help certain animals, specifically, amphibians.