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In this sunny day experiment, learners measure and compare how quickly light and dark colored materials absorb heat.

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).

In this activity, learners explore in what ways the shape of the land and the pull of gravity influence how water moves over Earth.

Glare from the sun and ripples from the wind can make it hard to see what's below the surface of a body of water.