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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?

This activity models some of the ways natural processes, such as erosion and sediment pollution, affect Earth’s landscape.

In this activity, learners explore chemistry and the microbial world by making their own sourdough starter and bread at home using only flour and water.

In this field study, learners discover how to collect data in the field and how their efforts can help certain animals, specifically, amphibians.