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25 Cards in this Set
- Front
- Back
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What do tectonic plates consist of?
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both continental and oceanic crust
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What is a possible result of plates moving along a transform boundary?
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earthquake
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What is the area called where two tectonic plates meet?
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a boundary
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What type of boundary is formed when plates collide?
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convergent
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What type of boundary is formed when plates separate?
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divergent
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What type of boundary is formed when plates slide past each other?
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transform
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What occurrence is associated with transform boundaries?
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earthquakes
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What do scientists use the global positioning system for?
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to measure tectonic plate motion
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What is compression?
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stress squeezing an object
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What is tension?
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stress pulling an object
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What can tectonic plates form when they converge?
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mountains
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What do tectonic plates float on?
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the asthenosphere
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What can continental-oceanic collisions be called?
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subduction zones
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What are mid-ocean ridges the most common type of?
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divergent boundary
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What causes changes in density in the asthenosphere?
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thermal energy
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What is the Saint Andreas fault an example of?
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strike-slip fault
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What is convergent boundary?
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where 2 plates collide
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What is divergent boundary?
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where 2 plates are moving away from each other
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What is transform boundary?
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where 2 plates are moving horizontally past each other
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What is the process of moving layers of rock by heating and cooling called?
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convection
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What is it called when denser oceanic lithosphere sinks beneath continental lithosphere?
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slab pull
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What is it called when oceanic lithosphere slides downhill due to gravity?
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ridge push
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What is the role of the asthenosphere in the movement of tectonic plates?
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The asthenospher is a layer made of solid rock that flows very slowly. The tectonic plates float, or move very slowly on top of the asthenosphere
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Why doesn't the earth grow larger, if the Earth's crust is growing at mid-ocean ridges?
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because crust is recycled at subduction zones, where one plate moves under another plate
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Why are the Appalachians Mountains now located in the middle of the North American plate?
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The Appalachians formed when North America and Africa collided. In time, the places separated and so much crust was created that the mountains were no longer at the plate boundary.
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