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Plate Tectonics

TermDefinition
Continental Plate Rocky material that makes up continents; less dense and contains a greater amount of lighter-colored minerals than the oceanic crust
Convergent Boundary The boundary between two tectonic plates moving toward each other
Divergent Boundary The boundary between two tectonic plates moving away from each other; on land creates rift valleys, on the sea floor created new ocean crust
Earthquakes Major geological events that occur when plates shift suddenly and release stored energy; a frequent occurrence at transform boundaries
Geological A science that deals with the history of the earth and its life especially as recorded in rocks
Mountain Building Major geological event that occurs when continental plates equal density converge
Ocean Basins Movement of plates create dense oceanic crust that sinks lower in the asthenosphere than the less dense continental crust, resulting in depressions on Earth's surface that fill with water
Oceanic Plate Portion of Earth’s outer crust that lies beneath the oceans; thin and dense
Plate Tectonics Huge pieces of lithosphere that slowly move on the asthenosphere, and consist of the crust and the rigid, uppermost part of the mantle
Sea-floor Spreading A parallel pattern of rock material found at identical locations on each side of the Mid-Atlantic Ridge reveals rock of the same geologic age and polarity
Subduction Occurs when one plate is denser than another and is forced below as the two plated converge at their boundary
Transform Boundary The boundary between two plates that slide pass one another; sudden shifts result in major geological events such as earthquakes and the release of stored energy
Volcanic Eruptions Major geological events that occur when a dense plate subducts below a less dense plate as they converge
Created by: jennychapates
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