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PT Vocab

Plate Tectonic Vocabulary

QuestionAnswer
outermost layer of the earth divided into plate tectonics Crust
layer of earth made of molten rocky material- where convection currents occur Mantle
layer of earth made of liquid metal Outer Core
layer of earth solid dense ball of nickel & iron Inner Core
more flexible molten layer of the mantle Asthenosphere
thin, rigid, outer layer of the mantle combined with crust & where plates move Lithosphere
theory that continents were once one large land mass Continental Drift
process at divergent boundaries where new earth is formed Sea-floor spreading
plate boundaries move toward each other- mountains, volcanoes, & Islands form Convergent Boundary
plate boundaries that move away from each other- creates rift valleys & mid ocean ridges Divergent boundaries
where the earth sinks into the mantle Subduction
plate boundaries slide past each other causing Earthquakes Transform boundaries
a break in the earth's crust- site of earthquakes fault
a squeezing force inside the earth Compression
a pulling force inside the earth Tension
Created by: Lhoggle
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