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

This fun and simple hands-on astronomy activity illustrates the value of supernovae in the universe.

In the wild, small crustaceans known as brine shrimp live in marine habitats such as saltwater lakes.

In this activity, learners create a freshwater ecosystem in a large plastic bottle. Learners cut and prepare bottles, then fill with water, aquatic plants, snails and fish.