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12 Cards in this Set

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  • Back

Theory

An idea that is suggested or presented as a possibly true but is not known or proven to be true

Theory of Plate Tectonics

Is a scientific theory that describes the large scale motion of earths lithosphere

Continental Drift

A theory that explains the formation alteration and extremely slow movement of the continents across the Earths crust

Sea floor Spreading

A process in which new ocean floor is created as molten material from the earth mantle rises in margins between plates or ridges and spreads out

Convergent Boundary

A tectonic boundary where two plates are moving toward each other

Subduction Zone

A convergent plate boundary where one plate subducts beneath each other usually because it is denser

Trench

Long narrow ditch caused by two plates pushing together

Pangea

Supercontinent that existed during the late Paleozoic and early Mesozoic eras,forming about 300 million years ago.

Divergent boundary

A boundary where two plates move away from each other and new crust is forming magma rises between two plates

Sea floor spreading

Process in which new ocean floor is created as molten material rises and spreads out.

Convection currents

The transfer of heat by the mass of heated particles into a cooler area

Rift

A large area of earth plates moving away from each other.