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

In this activity, learners explore how engineers design devices that can detect the presence of pollutants in the air.

In this activity, learners explore moving air and the physics of lift and drag by constructing homemade wind tunnels.

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

"Molecules in Motion" explores how materials behave and change in a vacuum.

In this activity, learners construct a simple air pressure launcher for paper rockets.

In this outdoor activity, learners search for lichen, a combination of a fungus and an alga living together. Lichen grow where most other plants cannot, on rocks, the trunks of trees, logs and sand.

In this outdoor, ocean-side activity, learners investigate the distribution of organisms in the upper region of the intertidal zone.

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.