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Globe at Night
Source Institutions
In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.
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Resource Hunt
Source Institutions
In this activity, learners explore nonrenewable resources and learn why these resources are finite.
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Clear Water, Murky Water
Source Institutions
How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?