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15 Cards in this Set

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asthenosphere
layer of earth's mantle found under the lithosphere...similar to plastic in its composition
Alfred Wenener
came up with theory of continental drift.
continental drift
theory that over time the continents moved across Earth in an eastern or western direction
convection current
force of plate tectonic in which the mantle's hot material enters the lithosphere, travels horizontally, cools off, then sinks again
convergent boundary
boundary between plates that are drawing close together
divergent boundary
the boundary between plates that are drawing further apart
lithosphere
Earth's crust and part of the upper mantle
magnetometer
used to record data about the magnetic field of Earth
Pangaea
Name given to giant landmass that eventually split up to become the continents
plate tectonics
Theory stating that part of Earth's lithosphere and crust are large thick plates that travel slowly around on the mantle
plates
the lithosphere sections that travel on the mantle
Rodinia
a giant supercontintnent that may have existed long before Pangaea
seafloor spreading
the theory stating that magma coming from the mantle of Earth travels to Earth's surface at mid-ocean ridges then cools, forming a new seafloor which inches away from the ridge over time
subduction zone
location at which a heavier plate from the ocean floor crashes into a lighter less dense continental plate to slide under the continental plate
transform fault
boundary that lies between two separate plates that slide past one another horizontally