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Learners add acid rain (nitric acid) to two cups that represent lakes. One cup contains limestone gravel and the other contains granite gravel.

This activity (located on page 3 of the PDF under GPS: Alligator Habitat Activity) is a full inquiry investigation into organisms and the health of their ecosystems.

Learners take a field trip along a local body of water and conduct a visual survey to discover information about local land use and water quality.

In this activity with several mini experiments, learners explore the chemistry that helps scientists learn about the environment and how they can help save it.