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Many people get water from a source deep underground, called groundwater.

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

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

Learners work in teams to design and build solar water heating devices that mimic those used in residences to capture energy in the form of solar radiation and convert it to thermal energy.

Water, whether fresh or salty, serves as one of the best electrical conductors on the planet. Does salt effect its conductivity?

In this outdoor activity, learners compare the moisture released from different kinds of leaves and from different parts of the same leaf, by observing the color change of cobalt chloride paper.

This Exploratorium activity can be used in many contexts because geysers are great opportunities for learning about heat and temperature changes as well as geological/space science phenomena.

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

When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.

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

Why is ocean water sometimes the warmest when the average daily air temperature starts to drop? In this activity, learners explore the differing heat capacities of water and air using real data.