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In this archaeology activity, learners consider ways in which excavating an underwater site is different from excavating a terrestrial site.

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.

In this online Flash game, learners take to the skies in a hot air balloon and are challenged to beat other balloonists' times to the finish line without crashing.

Learners model the ocean currents that carry hot water from the tropics to northern latitudes.

In this quick activity, learners observe how wind creates ocean currents.

In this outdoor activity, learners race small boats, made of cork, balsa wood, popsicle sticks etc., to investigate the rate and direction of currents in a stream or creek.

In this activity, learners explore the concept of density-driven currents (thermohaline circulation) and how these currents are affected by climate change.

In this activity, learners will explore how density is affected by temperature and how that can create currents.

In this design challenge activity, learners make a balloon hover at eye level for five seconds, and then make it move by creating air currents.