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Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?

In this nanoscience activity, learners discover that it's easy to pour water out of a regular-sized cup, but not out of a miniature cup.

In this physics activity, learners will explore buoyancy.

In this activity, learners will write a secret message that only their friends will be able to read.

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