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

In this outdoor activity, learners explore UV rays from the Sun and ways to protect against these potentially harmful rays.

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

In this activity, learners observe hard parts of sea creatures (shells, molts, etc.) to better understand marine environments.