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Some bugs can walk on the surface of a lake, stream, river, pond or ocean.

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.

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

This quick demonstration (on page 11 of PDF) allows learners to understand why scientists think water ice could remain frozen in always-dark craters at the poles of the Moon.

In this activity, learners interact with a 3-D model of a watershed to better understand the interconnectedness of terrestrial and aquatic environments.

In this edible experiment, learners pour "Magic Shell" chocolate into a glass of cold water. They'll observe as pillow shaped structures form, which resemble lavas on the sea floor.

In this optics activity, learners make a lens and explore how the eye manipulates the light that enters it.

In this activity, learners explore clouds and how they form.

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