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

In this activity, learners will examine various world data maps to combine the information and predict which areas could be tropical rainforests.

In this activity (page 11 of the PDF), learners investigate how quickly water moves through various materials. They measure and compare the permeability of gravel, sand, and soil.

In this activity, learners examine the different materials gardeners add to their soil, and discuss how these materials are important for plant growth.

In this outdoor activity, learners make their own organic-rich soil. Depending on where this activity is done, learners will probably discover that their local soil is low in organic matter.

In this activity, learners use sand and ice cubes to create a model of permafrost and the effects of the ice melting through the surface.

In this outdoor activity, learners use a "litter-critter" wheel to help them identify different animals they find living in a natural litter habitat.

When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.

In this outdoor activity, learners cut through and investigate rotten logs and then make log-profile puzzles for each other.

In this activity, learners will examine various world data maps to combine the information and predict which areas could be tropical rainforests.