When Mount St. Helens erupted on May 18, 1980, the top 400 meters (1,300 feet) of the volcano disappeared in a blast that covered more than 390 square kilometers (150 square miles) and sent thousands of tons of ash into...
This video documents an experiment conducted in Kane Cave, Wyoming, to see if microbes that inhabit the cave could actually be contributing to the cave-formation process. Adapted from a NOVA broadcast, the segment is...
This lesson focuses on the effects of volcanic eruptions on atmospheric chemistry. Students will use the internet to acquire data, analyze it graphically, and perform further analyses on recent eruptions and on...
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