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Plate Tectonics
Drift hypothesis to substance page 104 to 119
12
Science
8th Grade
03/16/2010

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Term
Continental Drift
Definition
The Hypothesis that states that the Continents once formd a single landmass, broke, up, and drifted to their present locations.
Term
Sea-Floor Spreading
Definition
the process in which new oceanic lithosphere forms as magma rises toward the surface and solidifies
Term
Plate Tectonics
Definition
The theory that explains how large pieces of the Earth's outermost layer, called tectonic plates, move and change shape.
Term
Convergent boundary
Definition
The boundary formed by the collision of two lithosperic plates
Term
Divergent Boundary
Definition
The boundary between two tectonic plates that are moving away from each other
Term
Transform Boundary
Definition
the boundary between two tectonic plates that are sliding past each other horizontally
Term
Compression
Definition
stress that occurs when forces act to squeeze an object
Term
Tension
Definition
stress that occurs when forces act to squeeze an object
Term
folding
Definition
the bending of rock layers due to stress
Term
fault
Definition
a break in a body of rock along which one block slides relative to anouther
Term
uplift
Definition
The rising of regions of the Earth's crust to higher elevations
Term
Substance
Definition
the sinking of regions of the Earths crust to lower elevations
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