Booming Sands

This video segment, adapted from NOVA scienceNOW, presents basic concepts of physics behind "booming" sand dunes. See how surface tension affects potential and kinetic energy and how it all works together to create sound.

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Changing Arctic Landscape

In this video adapted from the Arctic Athabaskan Council, learn how warmer temperatures in the Arctic are transforming the landscape, triggering a host of effects such as permafrost thawing and insect infestations.

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Earth System: Drought and Air Quality

This video segment adapted from NASA's Goddard Space Flight Center discusses how a drought can have negative effects locally, for example by increasing the number of forest fires, and also globally, for example by impacting air quality thousands of miles away.

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Flood: Farming and Erosion

In this video segment adapted from NOVA, scientists investigate how farming along the Mississippi River impacts floods and what can be done about it.

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The Nitrogen Cycle

Nitrogen, one of the most abundant elements in the universe, is essential to life. This interactive activity adapted from the University of Alberta provides an overview of the nitrogen cycle.

Organic Farming: Conserving Topsoil

Against the backdrop of the devastating 1930's Dust Bowl, this video segment adapted from Interactive NOVA profiles an organic farmer and the techniques he uses to conserve topsoil.

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Soils Around the World

Not all soils are the same. This interactive activity produced for Teachers' Domain features photographs of the 12 major soil types and maps that highlight their distribution around the world.

The Value of Wetlands

This video segment adapted from Texas Parks and Wildlife Department explores the role of the wetlands in our environment, including providing habitats for wildlife, acting as natural water filters, and playing a part in the greater water cycle.

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Water Conservation: Israel

This video segment adapted from Last Oasis shows how Israel has attempted to meet the challenge of providing enough water for agricultural needs. Featured are two methods: recycled water and drip irrigation.

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