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Geoscience flashcard

TermDefinition
magma molten mixture inside Earth's mantle.
lava molten mixture outside on earth's surface
plate section of the lithosphere that moves over the molten mantle
convection currents transfer of heat from one part to another less dense rises / more dense sinks
friction force as a surface moves across another surface
deep ocean trench long, deep, canyon
subduction old crust sinks back to the mantle
mid-ocean ridges undersea mountains where new ocean floor is created
sea-floor spreading molten material rises from the mid-ocean ridge and makes new ocean crust - pushes out the old crust.
Created by: ccmsA6
 

 



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