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How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

In this outdoor activity, learners visit the intertidal zone of a rocky coastal site well populated with marine organisms.

In this outdoor activity and bingo-like game, learners explore why and how seeds spread far from the plants that produce them.