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In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods.

In this outdoor biology and math activity, learners estimate the size of a population of organisms too numerous to count.

This activity (page 2 of the PDF under SciGirls Activity: Bogs) is a full inquiry investigation into decomposition.

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.