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LMS Ch 10.2 DR

The Theory of Plate Tectonics Directed Reading

QuestionAnswer
The movement of heated material due to differences in density is called?? Convection.
The cycle in which the cooler, denser water sinks and the warmer water rises to the surface to create a cycle is called?? A Convection Cell.
What causes tectonic plate movement?? The mantle drags overlying tectonic plates along.
What happens to newer, warmer rock at a mid-ocean ridge as it cools?? It sinks into the mantle and pulls away from the ridge.
Oceanic Crust?? Dense crust made of rock that is rich in iron and magnesium.
Continental Crust?? Low-density crust made of rock that is rich in silica.
Tectonic Plates?? Blocks of Earth’s shell that ride on a deformable layer of the mantle.
Lithosphere?? The solid outer layer of Earth, that consists of the crust and the rigid upper part of the mantle.
Asthenosphere?? Solid, plastic layer of the mantle beneath the lithosphere.
Divergent Boundary?? Boundary between tectonic plates that are moving away from each other.
Convergent Boundary?? The boundary between tectonic plates that are colliding,
Transform Boundary?? Boundary between tectonic plates that are sliding past each other horizontally.
Mid-Ocean Ridge?? Undersea mountain range.
Subduction Zone?? Region where one plate moves under another.
Fracture Zone?? Short segments of a mid-ocean ridge that are connected by transform boundaries.
Created by: ericyonggyuhong
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