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Lesson 16

Terms in this set (18)

Pangaea
The Super Continent
Alfred Wegener
The scientist that proposed the theory of Pangaea + Continental Drift
Harry Hess
The geologist that discovered sea floor spreading
Magnetic Reversal
The periodic switch of north + south seen in the mineral patterns of cooled lava
Subduction
When one tectonic plate sinks beneath another
Hotspot
Weak Spot in crust where magma eventually melts through
Law OF Uniformitarianism
Earth is constantly changing by same forces
Tectonic Plates
Large sections into which the lithosphere is broken, move 1-2 inches per yr.
Earthquake
the vibation of the earth produced by the rapid relaease of energy
sea floor spreading
the formation of new ocean floor from melted rock that seeps up from the mantle +flows into the space between plates that are moving apart
Convection currents
Movement of the magma in a circular motion
Lithosphere
the outer part of earth, made up of solid rock
Plate Boundary
THe place where tectonic plates meet
Folding
The process in which rock layers are squeezed together + pushed upwards, forming a ripple in earths crust
Mid Ocean Ridge
An underwater mtn, range that forms where ocean plates move apart
Fault
a break, or crack, in earth surface along which movement occurs
Volcano
An Opening in earth's crust which melted rock ash gas are released
Uplift
the folding of rock upward due to
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