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14 Cards in this Set

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What is the Asthenosphere?
Below the lithosphere in the earth's mantle.
Who believed in the continental Drift?
Alfred Wagner
What does the theory of continental drift say?
The continents were once one and drifted apart.
What was the name of the singular continent?
Pangea
What is a convection current?
It is the driving force of plate tectonics in which hot, plasticlike material from mantle rises to lithosphere, moves horizontally and goes back to mantle.
What is a convergent boundry?
It is the boundry between two plates that are moving toward each other.
What is a divergent boundry?
The boundry between two plates that are separating.
What is the lithosphere?
It is the outermost layer of the earth that is the crust and upper mantle
What is Plate Tectonics?
The theory that earth's crust and upper manntle are broken into sections, called plates that move around the earth.
What is seafloor spreading?
the theory that magma from the earth's mantle rises to the surfae and mid ocean ridges and cools to form the new seafloor, which new magma slowly pushes away from the ridge.
What is a subduction zone?
THe place where an oceanic plate sinks under the continental plate.
Transform fault
boundry between two plates thgat are sliding horizontally past eachother.
Why didn't anybody believe the continental drift idea?
He couldn't explain how when or why
Why didn't anybody believe the continental drift idea?
He couldn't explain how when or why