Earth's Layers
 
 
 
 
 
 
 
 
 
 
 
Plate Margins Earth's Layers
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USGS image
In the asthenosphere the earth boils a lot like a pot of water. In sections of the aesthenosphere convection currents rise to the surface and others sink to the bottom. This movement causes the plates of the earth to move. It makes the layers move by crushing rock plates in the trenches and shoving them down to be melted and by putting new molten rock in its place by escaping lava from volcanoes.
Energy Information Administration image
Volcano Team Glossary Site Outline Activities
Photo Citations

1. earthlay1 - USGS - This Dynamic Earth - http://pubs.usgs.gov/publications/text/unanswered.html

2. earthlay2 - Energy Information Administration - http://www.eia.doe.gov/kids/index.html
Text Citations

1. Allaaby, Michael & Curtis, Neil. Visual Factfinder. New York: Laroussse Kingfisher Chambers, Inc.

2. USGS Volcano Hazards Program. Volcano Photo Glossary. http://volcanoes.usgs.gov/Products/Pglossary/pglossary.html
Last visited 3-5-03.

3.University of North Dakota. Volcano World: http://volcano.und.nodak.edu/vw.html Last visited 3-5-03

4. USGS. This Dynamic Earth.
http://pubs.usgs.gov/publications/text/historical.html Last visited 3-5-03