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In this investigation, learners plant seeds in a 2-liter bottle filled with soil that is connected to a water source below. Over the next few weeks, learners observe how the plants grow.

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 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.