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This activity (on pages 35-43) lets learners analyze a "herd of elk" to detect the spread of a bacterial disease called brucellosis.

This activity (on pages 23-27) lets learners simulate the work of scientists who take core samples of Earth's rocky layers to determine geological history.

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

In this activity (on pages 9-14), learners dissect a real flower -- the kind of work botanists do.