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Hold a Hill
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In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-828.png?itok=OA8tQTc6)
Bean Bugs
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In this outdoor biology and math activity, learners estimate the size of a population of organisms too numerous to count.
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Trail Impact Study
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In this outdoor activity, learners plan a simple foot path and create an environmental impact study of the natural area where the path would be.
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Sand Dunes
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This outdoor activity (on page 2 of the PDF under SciGirls Activity: Sand Dunes) is a full inquiry investigation into how the amount of moisture in a sand dune relates to the number of plants growing