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Science Vocab

Plate Tectonics Vocab

divergent boundary when two tectonic plates are moving away from each other
convergent boundary when two tectonic plates are moving towards each other
transform boundary when two tectonic plates are sliding against each other in opposite directions
subside to sink
continental drift the gradual movement of the continents across the earth's surface
seafloor spreading the formation of new areas of oceanic crust
convection currents a current in a fluid that results from convection
boundary a dividing line
Pangea a supercontinent
rift a crack or a split
ridge a long narrow hilltop, mountain range, or watershed
trench a long narrow ditch
fault fracture in the continuity of a rock formation caused by shifting of dislodging of the earth's crust
Theory of Plate Tectonics outer rigid layer of the earth is divided into a couple of dozen plates that moves across the earth's surface relative to each other
Created by: SandraT19