An oceanic crust and a continental crust collide, which plate will be sub-ducted and why?
The oceanic crust will subduct under the continental crust because it is more dense.
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15
What are the two types of crust?
Oceanic and Continental
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20
At what type of boundary would you expect to find a mid-ocean ridge?
Divergent Boundary
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What is the theory of plate tectonics?
The theory that parts of the crust and upper mantle are broken into sections that can move and interact with each other to cause geologic events and structures.
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15
When two plates slide past each other what geological event occurs?
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20
There is a chain of volcanoes off the coast of Alaska, earthquakes are frequent in this area. What type of boundary is this on? What type of crusts are involved?
Convergent boundary, oceanic and continental crusts
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20
At what type of boundary would you expect to find mountains?
Convergent Boundary
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15
What is subduction?
When two plates collide and one goes under the other
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When two oceanic plates pull apart, what geological event or structure occurs?
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What is seafloor spreading?
When two oceanic plates pull apart, magma rises up and creates new crust. This happens over and over again causing the seafloor to get wider.
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15
What two plates need to interact for a mid-ocean ridge to form?
Oceanic and Oceanic
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15
When two continental crusts collide what geological event forms?
