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Wild Sourdough
Source Institutions
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.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-168.jpg?itok=cSmfVQZF)
Learning the Land
Source Institutions
In this activity, learners will take a step back and learn the history of the land they live on, and the people who used to live on it.
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Exploring Earth: Land Cover
Source Institutions
This activity models some of the ways natural processes, such as erosion and sediment pollution, affect Earth’s landscape.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-509.png?itok=B-jqFCWJ)
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.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-048.jpg?itok=1yrFdSBh)
Bird Feeder Challenge
Source Institutions
In this activity, learners are challenged to build a bird feeder using recycled materials from home and are encouraged to problem solve during the extensions.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-856.png?itok=iJuzU5Jf)
Monitoring Amphibians
Source Institutions
In this field study, learners discover how to collect data in the field and how their efforts can help certain animals, specifically, amphibians.
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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?