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11 Vocab. Words

Lithosphere A rigid layer made up of the uppermost part of the mantle and crust.
Athenosphere The soft layer of the mantle on which the lithopshere floats.
Convection Current The movement of a fluid,caused by differences in tempature, that transfers heat from one part of the fluid to another.
Conduction The transfer of heat within a material or between materials that are touching?
Convection The transfer of heat by movement of a fluid.
Continental Drift The hypothesis that the contninents slowly move across Earth's surface.
Pangaea The single landmass that broke apart 200 million years ago and gave rise to today's continents.
Fossil A trace of an ancient organism that has been perserved 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.
Deep- Ocean Trench. A deep valley along the ocean floor beneath which oceaninc crust slowly sinks towards the mantle.
Created by: Luray22499