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plate movement

TermDefinition
crust Earth's outer layer the coolest and least dense layer of earth. see also core and mantle
mantle the layer of earth beneath the crust .it is about 2900 km 1800 km thick
outer core a layer of molten iron and nickel that surrounds the inner core of earth
inner core a dense sphere of soild iron nickel at the center of earth
latitude the distance north or south of the equator
longitude the distance east or west of the prime meridian
oceanic trench long deep formation on the ocean floor that develops where two tectonic plates are moving
sea-floor spreading the process by which molten material adds new oceanic crust to the ocean floor
divergent boundary A plate boundary where two plates move away from each other
transform boundary A plate boundary where two plates move past each other in opposite directions
subduction The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
ocean trech An undersea valley that represents one of the deepest parts of the ocean
tectonic plate A piece of Earth's crust that according to plate tectonics, is pushed by movement in the asthenosphere.
lithosphere the cool solid outer shell of earth it consists of the crust and the rigid uppermost part of the mantle and is broken up into segments of plates.
fracture the breakage of a rock into two or more pieces
elasticity the ability of rock to be stretched and then return to its original position once the stress has been removed
stress the amount of force being applied to a rock or surface
strain change in volume,size,or shape that results from stress.
plate boundary A plate where pieces of the broken lithosphere meet
continental crust crust that contains mostly land, ranging from 15 to 70 kilometers 9 to 43 miles thick
oceanic crust crust that lies beneath the ocean ranging from 5 to 10 km 3 to 6 mi thick
friction A force that opposes the motion of objects which are I contact
rift valley the valley formed by a diverging plate boundary
Created by: user-2013468
 



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