Students observe two demonstrations to conclude why bulge developed on the north flank of Mount St. Helens and conclude that when the "cap" was removed the pressure inside the volcano was suddenly released causing the violent eruption.

Learners review previous lessons about volcanoes and name the phenomena they think the eyewitnesses of the Mount St. Helens witnessed. They play the roles of reporter, eyewitness and scientists who are serving on a committee...

Learners study topographic maps and contour lines and construct a simple three-dimensional model of Mount St. Helens before the May 18, 1980, eruption. They use topographic map skills to interpret the impact of the May 18, 1980, eruption...

Students compile information on volcanic activity at Mount St. Helens.  In this earth science lesson, students use the information they gathered on Mount St. Helens to answer questions and create charts in Excel.  Then students...

Learners use clustering/mind mapping techniques to generate ideas, graphically represent inferences, organize their conclusions and write a report that presents conclusions the writer has reached, and facts substantiating those conclusions.