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chapter 17 vocab

TermDefinition
continental draft proposed that Earth's continents had once been joined together
pangaea Greek word that means all the earth
magnetometer device that can detect small changes in magnetic fields
magnetic reversal flow in the outer core changes and Earth's magnetic field changes direction
paleomagnetism study of the history of Earth's magnetic field changes
isochron imaginary line on a map
seafloor spreading theory that explains how new ocean crust is formed at ocean ridges and destroyed at deep sea trenches
tectonic plates huge pieces of crust and rigid upper mantle that fit together
divergent boundaries regions where two tectonic plates are moving apart
rift valley continental crust begins to separate
convergent boundaries two tectonic plates are moving toward each other
subduction two plates collide the denser plate descend below the other plate
transform boundary two plates slide horizontally past each other
ridge push weight of the uplifted ridge is thought to push the oceanic plate toward the trench formed at the subduction zone
slab pull weight of a subducting plate pulls the trailing slab into the subduction zone
Created by: JakeMcGarity
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