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In this activity, learners explore how salt water freezes in comparison to fresh water.

In this simulation, learners explore how ocean currents spread all kinds of pollution—including oil spills, sewage, pesticides and factory waste—far beyond where the pollution originates.

The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.

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

In this quick activity (located on page 2 of the PDF under GPS Wetlands Activity), learners will model how wetlands act as natural filters for the environment.

In this design challenge activity, learners build a boat that can hold 25 pennies (or 15 one inch metal washers) for at least ten seconds before sinking.

Learners act as engineers and design mini submarines that move in the water like real submarines.

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.

In this activity, learners make a model of the hot water of a deep sea vent in the cold water of the ocean to learn about one of the ocean's most amazing and bizarre underwater habitats.

No glue is needed for learners of any age to become marshmallow architects or engineers.

This experiment is designed to illustrate how fluids, including water, have the ability to flow.

In this activity, learners will explore how a hydrometer works by building a working model and conducting experiments.

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

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