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Newnam-Plate Tect.

Plate Tectonics

QuestionAnswer
In which layer of the Earth are the plates found? lithosphere
Which layer of the Earth do the plates float on? athenosphere
What theory, proposed by Alfred Wegener, stated that the continents were once joined together and "drifted" to where they are today continental drift
What is the name of the supercontinent that once existed proposed by the theory of continental drift? Pangaea
mid-ocean ridge underwater mountain range that forms where two plates are being pulled apart
continental crust rocks that make up the continents; are less dense than oceanic crust
oceanic crust thinner, denser crust that makes up the oceans
fault crack within Earth's crust where rocks move past each other
plate boundary where two tectonic plates meet
convergent boundary where two plates are colliding
divergent boundary where two plates are separating
transform boundary where two plates are moving in opposite directions
subduction when one plate slides underneath another and melts into the mantle
folded mountain formed when two continental plates collide
volcanic mountains formed when an oceanic plate subducts underneath and continental plate Ex-Cascade or Andes
trench a deep ditch that forms on the ocean floor when an oceanic plate subducts underneath either a continental or another oceanic plate Ex-Marianas
island arc forms when an oceanic plate subducts underneath another oceanic plate Ex-Japan
rift valley forms when two continental plates separate Ex-Red Sea
Alfred Wegener scientist who proposed the theory of continental drift
Harry Hess scientist who discovered sea floor spreading
Created by: anewnam
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