Earth's surface has changed in countless ways during the 4.6 billion years since it formed, and it continues to change today. This video segment looks at some of the geologic processes that have shaped the landscape near...

Since the Hawaiian Islands were all created by volcanic activity, it is somewhat surprising that only the island of Hawaii now possesses any active volcanoes. Why did the volcanoes that built the other islands stop...

The SAGUARO project CD-ROM features three learning modules that use GIS to learn about earth system science. The three modules - Exploring Tropical Cyclones, Exploring the Dynamic Earth, and Exploring Water Resources -...

This teacher's guide provides directions for building three-dimensional models from foam blocks to demonstrate plate tectonic principles, plate boundary interactions and the geometry and relative motions of faulting of...

This lesson introduces the idea that rates and directions of plate movements can be measured. The discussion centers on the use of mantle 'hotspots' to determine plate motions. Examples include the Hawaiian Islands, the...