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As a model of acid rain, learners water plants with three different solutions: water only, vinegar only, vinegar-water mixture.

Learners observe and discuss a simple model of a wet scrubber, a device for cleaning industrial air pollution.

This lesson challenges groups of learners to design and construct a wind generator with the most electrical output.

In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment.

In this outdoor activity/field trip, learners locate and study plants and animals in several freshwater pond habitats.