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Earth's Crust

TermDefinition
Crust Earth’s outermost layer
Mantle The layer directly beneath Earth’s crust
Core Earth’s innermost layer
Lithosphere The cool, solid portion of Earth that includes all of the crust and a part of the upper mantle
Asthenosphere A zone of partially melted rock in the upper mantle of the earth
Plate tectonics The theory scientists use to explain the movement of plates on the earth’s surface
Divergent boundary A boundary where crustal plates move away from each other
Convergent boundary A boundary where plates collide with each other
Transform fault boundary A boundary where crustal plates grind past each other
Mid-ocean ridge The place where plates of earths crust along the ocean floor are being split and molten rock pushes up to form a new ocean floor and mountain ranges
Rift A deep ocean valley formed where two crustal plates move apart
Sea-floor spreading A process in which magma is slowly pushed up through cracks in a rift and then cools to form a new seafloor
Created by: tiffanyglover