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

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

In this chemistry activity, learners use common chemicals and metals to explore single replacement reactions.

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.

Learners mix vinegar and baking soda to produce a gas. With the addition of a bit of liquid soap, the gas becomes trapped in measurable bubbles.

Learners add calcium chloride to a baking soda solution and observe an increase in temperature along with the production of a gas and a white precipitate. These are all signs of a chemical reaction.