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Chapter 3 Science

Vocab Words

TermDefinition
continental drift The hypothesis that the continents slowly move across Earth's surface.
Pangaea The name of a single landmass that began to break apart 200 million years ago and gave rise to today's continents.
fossil Any trace of an ancient organism that has been preserved in rock.
mid-ocean ridge An undersea mountain chain where new ocean floor is produced, a divergent plate boundary.
sea-floor spreading The process by which molten material adds new oceanic crust to the ocean floor.
subduction The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle again.
plate A section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust
Created by: HVespalec
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