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

Over $20 per group Ages 4 - adult 5 to 10 minutes
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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?

$10 - $20 per group Ages 8 - adult 10 to 30 minutes