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

In this ecology activity, learners make a model water-based ecosystem called a terraqua column. The column (in a large soda bottle) includes pond water, duckweed, sand or gravel, and small snails.

In this activity, learners will examine various world data maps to combine the information and predict which areas could be tropical rainforests.

In this activity, learners will examine various world data maps to combine the information and predict which areas could be tropical rainforests.