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Objective 9

vocab

TermDefinition
continental drift hypothesis that continents are in constant motion
mantle middle layer of earth situated between the crust above and the core below
pangaea ancient supercontinent composed of land that forms todays continents
mid-ocean ridge mountain range located on the seafloor in the middle of the ocean
seafloor spreading new oceanic crust forms at a mid-ocean ridge as old oceanic crust moves away
convection circualation of material caused by differences in temperature and density
convergent plate boundary where two plates collide
lithosphere cold,rigid outermost rock layer of earth
plate tectonics theory that earths surface is made of rock plates that move with respect to each other
subduction sinking of a denser plate below a more buoyant plate at a convergent plate boundary
transform plate boundary where two plates slide by each other
divergrent plate boundary where two plates seprate
Created by: user-2006813
 

 



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