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In this environmental science activity (page 3 of the PDF), leaners will identify and explain the causes of erosion.

In this online Flash game, learners will captain a sailing challenge, adjusting boat direction and sails, seeking the way to take greatest advantage of varying wind speeds and directions to catch the

In this online activity, learners see simulations of how processes shape the Earth, and see estimates of how long these processes take.

In this outdoor, beach activity, learners use tennis balls, water balloons and other simple devices to investigate the movement of waves and currents off a sandy beach.

In this design challenge activity, learners build a tower that can support a tennis ball at least 18 inches off the ground while withstanding the wind from a fan.

In this outdoor activity, learners simulate an oil spill using popcorn (both oil and popcorn float on water), and estimate the spill's impact on the environment.

In this three-part activity, learners explore how waves are formed and why some waves are bigger than others. First, learners observe waves of water in a pan generated by an electric fan.

In this thought-provoking activity, learners plan a hypothetical project to build and operate wind turbines in their community.

In this experiment, learners use a blow dryer and water bottle to observe and record changes in air pressure caused by changes in temperature.