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Earth structure  
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Through a series of interactive multimedia activities, animations, videos, and online lessons, students develop an understanding of permafrost and its connections to climate change. NASA data from space, suborbital, and ground platforms are... (View More)

In this problem-based learning unit, learners examine the causes and impacts of dust transported through the atmosphere. An estimated two billion tons of dust is emitted by the Earth annually. Scientists are becoming increasingly interested in the... (View More)

In this problem-based learning module, learners study phytoplankton blooms along the U.S. coast. Phytoplankton form the basis of the marine food web, regulate carbon in the atmosphere, and are responsible for half of the photosynthesis that takes... (View More)

In this problem-based learning unit, students learn about the causes and impacts of urban heat islands. Numerous studies have shown how concrete pavements and buildings retain heat in cities, making cities several degrees warmer than the surrounding... (View More)

In this problem-based learning activity, learners investigate impact of sulfur dioxide on the environment. Sulfur dioxide comes from both human activities and natural sources. Burning coal and other fossil fuels is the largest source of sulfur... (View More)

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