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In this activity (on pages 29-35), learners examine water pollution and filtration.

In this investigation learners explore the differences between, and interdependence of, living and nonliving elements in a water ecosystem.

In this activity, learners experience firsthand how marine animals' adaptive coloration camouflages them from prey.

In this activity with several mini experiments, learners explore the chemistry that helps scientists learn about the environment and how they can help save it.