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Some aquatic organisms live in open water, while some live in soil at the bottom of a body of water.

Some bugs can walk on the surface of a lake, stream, river, pond or ocean.

This is part 2 of the three-part "Crayon Rock Cycle" activity and must be done after part 1: Sedimentary Rocks. In this activity, learners explore how metamorphic rocks form.

In this activity, learners will discover how the thin layers of amphibians' skin allow water and other chemicals to pass through it.