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Plate Tect. Vocab

Vocab

QuestionAnswer
the preserved remains or traces of an ancient organism (plant or animal) Fossils
the single giant landmass that existed more than 200 million years ago and that gave rise to the present day continents Pangaea
the theory proposed by Alfred Wegener that the continents were once joined together and have since drifted apart Theory of Continental Drift
an undersea mountain chain where new ocean floor is produced; a constructive (divergent) plate boundary Mid-Ocean Ridge
the process in which old ocean floor is pushed away from a midocean ridge by the formation of new ocean floor Ocean Floor Spreading
a fault that runs across a midocean ridge Transform Fault
a v-shaped valley on the ocean floor where old ocean floor is subducted; a destructive (convergent)plate boundary Trench
the process in which lithosphere plunges back into the interior of the Earth Subduction
Created by: sheilagh
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