www.notinmybook.com
2007-02-12 12:20:10
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answer #1
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answered by icecreamboy121 4
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Maybe this will help you out. The main piece of the story is aw wikipedia.
Plate tectonics (from Greek ÏÎκÏÏν, tektÅn "builder" or "mason") is a theory of geology that has been developed to explain the observed evidence for large scale motions of the Earth's crust. The theory encompassed and superseded the older theory of continental drift from the first half of the 20th century and the concept of seafloor spreading developed during the 1960s.
The outermost part of the Earth's interior is made up of two layers: above is the lithosphere, comprising the crust and the rigid uppermost part of the mantle. Below the lithosphere lies the asthenosphere. Although solid, the asthenosphere has relatively low viscosity and shear strength and can flow like a liquid on geological time scales. The deeper mantle below the asthenosphere is more rigid again.
The lithosphere is broken up into what are called tectonic plates—in the case of Earth, there are seven major and many minor plates (see list below). The lithospheric plates ride on the asthenosphere. These plates move in relation to one another at one of three types of plate boundaries: convergent, divergent, and transform. Earthquakes, volcanic activity, mountain-building, and oceanic trench formation occur along plate boundaries. The lateral movement of the plates is typically at speeds of 0.66 to 8.50 centimeters per year.
2007-02-12 20:25:28
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answer #2
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answered by sgt_cook 7
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Enough information here to give you a start for your project.
WEBSITES ON EARTHQUAKES & VOLCANOES
A comprehensive site with lots of links.
http://www.cumbavac.org/Earthquakes_Volcanoes.htm
Earthquakes
http://www.stemnet.nf.ca/CITE/earthquakes.htm
Teacher Resources on Earthquakes
http://www.stemnet.nf.ca/CITE/earthquakes_teacher.htm
http://www.volcano.si.edu/
http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/framework.html
http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/Maps/map_plate_tectonics_world.html
http://www.mapsofworld.com/major-volcanoes.htm
Potentially Active Volcanoes in the 48 United States
http://www.nationalatlas.gov/dynamic/dyn_vol-us.html
http://www.nationalatlas.gov/dynamic/dyn_volcano.html
Good luck.
Kevin, Liverpool, England.
2007-02-12 21:28:44
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answer #3
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answered by Anonymous
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Pangea (all were together at once), continental drift (drifted apart) Techtonic Plate theory? Any of this ringing a bell?
2007-02-12 20:16:40
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answer #4
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answered by Anonymous
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plate tectonics pangea earthquakes
2007-02-12 20:19:53
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answer #5
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answered by Anonymous
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continetal drift
that's the only one i no. we only went over 1 in class my science teacher said there was another but he never told us what it was
hope this helps,
countrychick26
2007-02-12 20:19:13
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answer #6
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answered by ? 2
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I know one is plate tectonics
the other is...I don't know but i hope this helps you along
2007-02-12 20:20:29
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answer #7
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answered by who wants to know? 2
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continential drift maybe?
2007-02-12 20:18:46
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answer #8
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answered by Kipper to the CUP! 6
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idk but yeps srry but hi ashley how r u? jk jk lol go to dg .com k
luv ashley
2007-02-12 20:27:50
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answer #9
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answered by ashipaila 2
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