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In this activity, learners create models of erosion and floods and learn to recognize both in their environment.

In this laboratory activity, learners use a simple procedure to bait oomycetes from water and/ or soil and then examine these fungus-like organisms with the microscope to see how they look.

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

Learners observe two joined glass tubes containing a conductive salt solution. Electrodes are passing an electric current through the water.