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Plate Tectonics

Mrs. Boyle

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hot spot Earth's rigid outer layer consisting of the crust and uppermost mantle
asthenosphere the unequal distribution of heat within the Earth that causes thermal convection in the mantle and ultimately causes plate motion
mantle convection chain of small volcanic islands that forms when two oceanic plates converge
continental drift supercontinent proposed in the continental drift hypothesis
plates an iron-rich mineral
Wegener what Wegener could not explain for how continents can move
mantle plumes primary forces that cause plate motion
Pangaea theory that states Earth's rigid outer shell is divided into several individual segments
slab-pull Earth's rigid outer shell is divided into several segments called...
seafloor spreading comparitively weak layer of Earth's crust that is beneath the lithosphere
lithosphere evidence that supports the idea that plates move over Earth's surface
paleomagnetism the mechanism responsible for producing new oceanic crust between two diverging plates
transform fault boundary appearance of hot spots and volcanoes at Earth's surface is evidence of...
volcanic island arc boundary where oceanic lithosphere plunges beneath an overriding continental plate
plate tectonics plate boundary where plates move apart, resulting in upwelling of material from the mantle to create new seafloor
convergent oceanic-continental deep faulted structure created during the breakup of a continent along a divergent plate boundary
mountain belts occurs where two plates grind pass each other without creating or destroying lithosphere
subduction zone occurs when one oceanic plate is forced down into the mantle under anothe plate
mechanism rocks that posess the magnetic polarity of the Earth at the time they were formed
rift one type of evidence that supports Wegener's continental drift hypothesis that begins on one continent and continues on another
divergent hypothesis that states continents had once been joined to form a supercontinent
magnetite scientist who first came up with hypothesis of continental drift

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