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Unit REVIEW 2

Study Cards...

TermDefinition or Explanation
Continental Drift theory that continents were once connected in one large mass, and moved apart since.
Pangea the name of the huge landmass that was the only continent on earth millions of years ago.
Alfred Wegener German scientist who was trained as an astronomer but was interested in meteorology.
Plate Tectonics the theory that earth's surface consists of separate plates that move and interact, producing geologic features and events (for example, earthquakes, volcanoes, mountains, and earth´s crust itself)
Faults a break in the lithosphere along which bodies of rock can move.
Trench narrow elongated depression on the deep-sea floor.
Continental Margin ocean floor between the shoreline and the abyssal ocean floor; includes continental shelf, slope, and rise.
Midocean Ridge long elevated region of the ocean floor with a central valley running along its top
Metamorphic A class of rocks that forms when heat and pressure act on igneous or sedimentary rock.
Oceanic crust is much thinner and younger than continental crusts.Oceanic crust is denser than continental crust.
Rocks in the ocean's crust are Underline Starts Underline Ends Igneous they come from volcanoes. Rocks of the continents are metamorphic they come from deep within the earth and have been changed by heat and pressure.
Tectonic Plates sections of lithosphere that move slowly over the surface of the earth
Earths what causes what?! Earth's internal heat comes from (1) heat energy remaining from the earth's formation, and (2) radioactive substances. As this heat escapes, it moves the plates around
Where are the faults? At the San Andreas fault in California, the North American plate slides past the Pacific plate.
Plate Boundaries The lines where they meet are called plate boundaries.
Types of Plate Boundaries convergent, divergent, transform,
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