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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?

Water sticks to all kinds of things in nature — flowers, leaves, spider webs - and doesn't stick to others, such as a duck's back.

In this activity, learners construct a simple electrolysis device. With this device, learners can decompose water into its elemental components: hydrogen and oxygen gas.