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Q: Plate tectonics is the movement of lithospheric plates. These plates float on the and move because of mantle .
A: asthenosphere and convection
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User: Plate tectonics is the movement of lithospheric plates. These plates float on the and move because of mantle .

Weegy: asthenosphere and convection
danna21|Points 13083|

User: The four main spheres of the exterior of Earth are the _____.

Weegy: Four major parts of Earth work together as a complex system: rocks, water, air, and life. On a global scale, each part can be thought of as a sphere, roughly the same size and shape as the planet. [ The four parts are called the geosphere, hydrosphere, atmosphere, and biosphere ]
falloutgirl19|Points 636|

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Asked 10/13/2010 6:19:14 PM
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The Mesozoic Era is an interval of geological time from about 252 to 66 million years ago.
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In geology, petrifaction, petrification or silicification is the process by which organic material is converted into stone by impregnation with silica. It is a rare form of fossilization. Petrified wood is the most well known result of this process, but all organisms from bacteria to vertebrates can be petrified.
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In geology, petrifaction or petrification is the process by which organic material is converted into stone through the replacement of the original material and the filling of the original pore spaces with minerals.
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Catastrophism is the theory that the Earth has been affected in the past by sudden, short-lived, violent events, possibly worldwide in scope.
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