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16 Cards in this Set
- Front
- Back
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What are the two different types of plates?
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ocean floor drifts and continents
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What is theory of Isostasy?
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continental plates are lighter and thicker, so they float. Ocean basins are thinner, but denser, so they sink
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What explains the vertical motion of the earth's plates?
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The theory of isostasy
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What explains the horizontal movement of the earth's plates?
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plate tectonics
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What is meant by geographic edge?
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some of our continents are actually buried under water
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What is an Abyssal Floor?
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a large, smooth area on the ocean floor
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what do the mid-ocean ridges mark?
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Where two oceanic plates are pulling apart, and new crust is being formed
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What is a continental shelf?
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part of a continent that is buried under water
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As you go further down from a continental shelf, what does it turn into?
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continental slope then continental rise, and then finally, an oceanic trench
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Would a wall where one side the room is on fire and there's not a fire on the other side?
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high gradient (rapid shift in temp in short depth)
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What is Adiabatic Expansion
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mantle rock rises and then expands as it cools as it gets to the surface
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What drives convection?
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the subduction of the oceanic crust. It sinks
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What is a divergent boundary?
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where two plates drift apart
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What is a convergent boundary?
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subduction zone boundary
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What are the two types of convergent margins?
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subduction zone and where they collide and one doesn't sink
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qWhat is a transform fault margin?
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where two plates slide past each other
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