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17 Cards in this Set
- Front
- Back
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plate tectonics
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possible explanation of why and how continents move.
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oceanic & continental crust
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two types of earths crust
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lithosphere
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made up of ocean and continental crust and upper mantle.
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asthenosphere
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beneath lithosphere: a layer of plastic rock-solid rock
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divergent boundary
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plates moving apart and molten rock from asthenosphere rises and fills spaces in between
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tectonics
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meaning construction
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rift valley
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in center of mid-ocean ridge; a narrow valley formed as plates separate
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convergent boundary
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the direct collision of one plate with another
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subduction zone
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region along a plate boundary where one plate moves under another
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ocean trench
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forms along a subduction zone
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subducted
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forced under less dense continental crust
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island arc
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part of subducted plate melts and the resulting molten rock rises to the surface along the trench to form a chain
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transform fault boundary
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forms where two plates are grinding past each other
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convection
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the transfer heat through the movement of heated fluid materica
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convection current
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the cycle of warm water rising and cool water sinking to replace it
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suspect terranes
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new discoveries are providing some possible explanations
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terranes
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pieces of lithosphere
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