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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 lab, learners experience how dolphins and other echolocating animals use their senses to locate and identify objects without using their sense of sight.

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