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Using pipe cleaners, straws, and beads, learners explore the building blocks of life by creating their own model of DNA.

Learners build a model of a pollution control device--a cyclone. A cyclone works by whirling the polluted air in a circle and accumulating particles on the edges of the container.

In this activity, learners imitate the way vocal cords work by building a model from a plastic cup, rubber band, and a straw.

Learners observe and discuss a vacuum cleaner as a model of a baghouse, a device used in cleaning industrial air pollution.

Learners will construct a model of a heart valve using a film canister, a piece of masking tape, and a piece of paper.

In this activity, learners simulate the behavior of the atmosphere.

In this quick activity about pollutants and groundwater (page 2 of PDF under Water Clean-up Activity), learners build a model well with a toilet paper tube.

In this activity, learners make balloon models of disease-causing bacteria.

By making models of light waves with paper, learners can understand why different colors appear in bubbles.