sedhrouten - 6th Grade Science Plate Tectonics Geologists...

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6 th Grade Science Plate Tectonics
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Geologists are scientists who study the forces that make and shape the planet Earth. Geologists study the Earth’s interior through seismic waves.
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Geologists discovered the Earth has three layers- the crust, the mantle, and the core. The oceanic crust beneath the ocean consists mostly of dense rock like basalt. Continental crust consists of less dense rock like granite. The upper mantle and crust make up the lithosphere. The asthenosphere is a soft layer that can bend like plastic.
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Heat is transferred in the mantle through radiation, conduction, and convection. Radiation is the transfer of heat through empty space. Conduction is heat transfer by direct contact of particles of matter. Convection is heat transfer by the movement of heated liquid.
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Alfred Wegener first proposed the theory of continental drift. Continental drift is Wegener’s theory that all continents
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