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Plate Tectonics

TermDefinition
Theory of Plate Tectonics The theory that Earth's outer crust (lithosphere) is divided into several plates that glide over the plastic-like and les rigid asthenosphere (upper mantle).
Convection Transfers energy in the mantle. Causes the hotter magma in the mantle to rise and causes the cooler magma in the mantle to sink
Divergent Boundary Dividing or moving apart. New crust is created.
Convergent Boundary Colliding or coming together. Continental/Oceanic = Volcanoes are formed. Continental/Continental = Mountains are formed
Transform Boundary Sliding past each other. Plates slip sideways past each other creating earthquakes. Crust is neither created nor destroyed.
Crust The outer layer of the Earth. Made up of both continental (land) and oceanic crust (under the ocean). 5-50km thick
Oceanic crust A thin layer of crust that overlies the ocean basins
Continental Crust Layer of rock which forms the continents
Lithosphere Solid outer section of Earth, composed of the crust and upper mantle
Asthenosphere Solid part of the upper mantle. Weaker, less rigid, but the crust moves over the plastic-like layer. Lies underneath the lithosphere.
Created by: LMcdRob
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