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Dig a hole, line it, fill it with fresh water, and you have a water hole: a good place to study colonization.

$5 - $10 per group Ages 8 - 18 1 to 12 months
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Learners explore the variables that affect the properties of ice and the places where different types of ice are found.

$1 - $5 per group Ages 8 - 14 45 to 60 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