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19 Cards in this Set
- Front
- Back
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Theory of plate tectonics explains____, ____, ____
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Theory of plate tectonics explains formation, movement, and subduction
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What do geologist think causes the plate to move
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convection currents in the mantle
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When the plates move what gets changed on the earth's surface
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Earthquakes volcanoes mount. ranges, and deep ocean trenches
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The edge of the Earth's plate's is called
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Plate boundaries
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What forms along the boundaries
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Faults
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Spreading boundary
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the plates stretch apart from each other also known as divergent boundary
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Colliding boundary
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The plates clash together. also known as convergent boundary
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Sliding boundary
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the plates slip apart from each other also known as transform
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Where do most Spreading boundaries occur
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mid ocean ridge
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What determines which plate will subduct
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the more denser one will subduct
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Name three types of colliding boundaries
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oceanic/oceanic
oceanic/continental continental/continental |
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oceanic/oceanic
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the more denser one subducts
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continental/continental
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since none are dense they create a mountain
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oceanic/continental
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the oceanic crust subducts
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True or false
Along sliding boundaries crust is neither created nor destroyed |
true
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What technology is used to map the mid ocean ridge
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sonar
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why is the pacific ocean sinking
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the ocean has many deep ocean trenches but subduction occurs even faster than new crust can be added
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why is the Atlantic ocean expanding
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has few short trenches oceanic floor is attached to the continental.
spreading floor has nowhere to go |
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in the mid ocean ridge where is new rock where is old rock
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old rocks is far away from the middle because it has been a long time since it has been new. New rock is closer to the middle because it just came out of the molten material
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