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In this activity, learners will investigate the part of soil. Explore how clay, silt, and sand make up the dirt in your background. Activity includes step-by-step instructions and extension ideas.

In this activity, learners will investigate and compare the root systems of plants. Explore how weed and edible plant roots differ, and take a closer look inside with the careful use of a knife!

In this math activity, learners observe and sketch cracking patterns in pavement.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.