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science chap. 3

plate tectonics

TermDefinition
continental drift The hypothesis that the continents slowly move across Earths surface.
Pangea The name of the single landmass that began to break apart 200 million years ago and gave rise to today's continents
fossil The preserved remains or traces of an organism that lived in the past.
mid-ocean ridge An undersea mountain chain where new ocean floor is produced; a divergent plate boundary.
deep-ocean trench A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.
sea-floor spreading
subduction
Created by: terry3003
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