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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.

In this laboratory activity, learners design an experiment to evaluate how environmental factors influence the growth of molds.

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.