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science test friday

science

TermDefinition
subduction the sideways and downwards movement of the edge of a plate of the earths crust into the mantle beneath another plate.
lithospere the rigid outer part of the earth, consisting of the crust and upper mantle
asthenospere the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur
convergent A tectonic boundary where two plates are moving toward each other. If the two plates are of equal density, they usually push up against each other, forming a mountain chain.
transform In the theory of plate tectonics, the earth's crust is broken into plates that move around relative to each other.
constructive of, relating to, or of the nature of construction
rift valley where the Earth's lithosphere has become thin through extension associated with plate-tectonic processes
convection currents the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
mid ocean ridge a long, seismically active submarine ridge system situated in the middle of an ocean basin and marking the site
fault an extended break in a body of rock, marked by the relative displacement and discontinuity of strata on either side of a particular surface.
trench Trenches form when one tectonic plate slides beneath another plate at a subduction zone.
Created by: sisimeadow
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