Data Bases • Custom Term Papers • Free Term Papers • Free Research Papers • Free Essays • Free Book Reports • Plagiarism? Links • Top 100 Term Paper Sites • Top 25 Essay Sites • Top 50 Essay Sites • Search 97,000 Papers @ DirectEssays.com • Search 101,000 Papers @ ExampleEssays.com • Search 90,000 Papers @ MegaEssays.com Free Essays • Term Paper Sites • Chuck III's Free Essays • Free College Essays • TermPaperSites.com • My Term Papers • Get Free Essays • Essay World • Planet Papers	Search Lots of Essays Back to Subjects - Science saint helens saint helens Many things can happen before, during, and after a volcanic eruption. A volcanic eruption is an extraordinary thing. You never know what is going to turn out as in the end. Before a volcanic eruption you may notice that the scenery slightly changes. The volcano is covered with lakes, streams, homes, old growth trees, along with many private homes and hotel resorts. Convection currents that move the plates, and cause movements make earthquakes and volcanoes. One of the many things that can happen before an explosion is the magma with in the volcano rises and collects in large chambers, the pressure decreases, and the magma expands. Every volcano has some sort of cap. The cap of a volcano is sort of a plug that holds everything in. While the magma expands in the center of the volcano the ground picks up its heat level, enlarges itself, and it also starts to slant. Volcanoes and earthquakes are activated when the convection currents move the plates in the seduction zone and cause the heat to re-melt the crust. Earthquakes and the magnitude may change months prior to the eruption. Bibliography: Word Count: 192
Copyright © 2005 College Term Papers, INC All Rights Reserved.