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Convergence of Plates-Ocean-Ocean
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1

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At an ocean-ocean converging plate boundary, at what depth do earthquakes occur within the subduction zone?
A)shallow
B)intermediate
C)deep
D)at all depths
E)earthquakes do not occur at converging plate boundaries
2
What is the origin of magma at an ocean-ocean converging plate boundary?
A)Magma is generated by melting in the crust of the descending plate
B)Magma is generated by melting in the asthenosphere of the overriding plate
C)Magma is generated by melting in the asthenosphere of the descending plate
D)Magma is generated by melting in the crust of the overriding plate
E)Magma is not generated at convergent plate boundaries
3
What causes the melting of rock to form magma in a subduction zone?
A)Melting is caused by friction between the descending plate and the overriding plate
B)Melting is caused by pressurization of the descending plate
C)Melting is caused by heating of the descending plate
D)Melting is caused by pressure release in the descending plate
E)Melting is caused by the expulsion of water from the descending plate into the rock of the overriding plate
4
Which is a modern example of a volcanic island arc?
A)The Andes Mountains in South America
B)The Hawaiian Islands in the Pacific Ocean
C)The Galapagos Islands off the coast of Ecuador
D)The Aleutian Islands in Alaska
E)Iceland in the north Atlantic
5
What determines which plate will subduct where two plates meet at an ocean-ocean plate boundary?
A)The older, more dense plate will subduct
B)The younger, less dense plate will subduct
C)The faster moving plate will subduct
D)The slower moving plate will subduct
E)One plate will subduct and one will not, simply by chance





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