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Ch. 7 V

Chapter 7 vocab sections 1-4

TermDefinition
1 Crust The thin and solid outermost layer of the Earth above the mantle.
1 Mantle The layer of rock between the Earth's crust and core.
1 Core The central part of the Earth below the mantle.
1 Lithosphere The solid, outer layer of the Earth that consists of the crust and the rigid upper part of the mantle.
1 Asthenosphere The soft layer of the mantle on which the tectonic plates move.
1 Mesosphere The strong, lower part of the mantle between the asthenosphere and the outer core.
1 Tectonic Plate A block of lithosphere that consists of the crust and the rigid, outermost part pf the mantle.
2 Continental Drift The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations.
2 Sea-Floor Spreading The process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies.
3 Plate Tectonics The theory that explains how large pieces of the earths outermost layer, called tectonic plates move and change shape.
3 Convergent Boundary The boundary formed by the collision of two lithospheric plates.
3 Divergent Boundary The boundary between two tectonic plates that are moving away from each other.
3 Transform Boundary The boundary between tectonic plates that are sliding past each other horizontally.
4 Comprression Stress that occurs when forces act to squeeze an object.
4 Tension Stress that occurs when forces act to stretch an object.
4 Folding The bending of rock layers due to stress.
4 Fault A break on a body of rock along which one block slides relative to another
4 Uplift The rising of regions of the Earth's crust to higher elevations.
4 Subsidence The sinking of regions of the Earth's crust to lower elevations
4 Normal Fault When rocks are pulled apart because of tension
4 Reverse Fault
4 Strike-Slip Fault
4 Folded Mountains
4 Volcanic Mountains
4 Rift zone
Created by: abi61080
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