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Science · Earth sciences
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1.)

Which of the following convergent boundary types will NOT result in a deep-ocean trench forming?

a. continental-continental collision

b. oceanic-continental collision

c. oceanic-oceanic collision
d. All of these boundary types result in the formation of a deep-ocean trench.

2.)

What causes the rate of lithosphere destruction to be roughly equivalent to the rate of lithosphere creation?

a. Older and denser oceanic lithosphere is constantly subducting into the mantle at a rate equal to new lithosphere creation at convergent boundaries.
b. Older and denser oceanic lithosphere is constantly crumpled into mountains when colliding with continental lithosphere at a rate equal to new lithosphere creation at divergent boundaries.
c. Mountains erode at the same rate as the creation of new lithosphere creation at divergent boundaries.
d. Older and denser oceanic lithosphere is constantly subducting into the mantle at a rate equal to new lithosphere creation at divergent boundaries.
e. Older and denser continental lithosphere is constantly subducting under oceanic lithosphere at a rate equal to new lithosphere creation at divergent boundaries.

3.)

Why does oceanic lithosphere subduct under continental lithosphere, whereas continental lithosphere does not subduct under oceanic lithosphere?

a. The oceanic lithosphere is thinner and denser than the continental lithosphere, which is thicker and less dense.
b. The oceanic lithosphere is thicker and denser than the continental lithosphere, which is thinner and less dense.
c. The oceanic lithosphere is thinner and less dense than the continental lithosphere, which is thicker and denser.
d. Because of mountains and land relief on the continental lithosphere, it is heavier than oceanic lithosphere, pushing it downwards into the mantle.
e. The oceanic lithosphere contains more water than the continental lithosphere, which floats on top of the oceanic lithosphere.

4.)

How are a continental volcanic arc and a volcanic island arc different?

a. A continental volcanic arc is a result of an oceanic plate subducting under a continental plate, whereas a volcanic island arc is a result of two oceanic plates colliding into each other.
b. A continental volcanic arc is a result of a continental plate subducting under an oceanic plate, whereas a volcanic island arc is a result of an oceanic plate subducting under another oceanic plate.
c. A continental volcanic arc is a result of an oceanic plate subducting under a continental plate, whereas a volcanic island arc is a result of an oceanic plate subducting under another oceanic plate.
d. A continental volcanic arc is a result of two continental plates colliding into each other, whereas a volcanic island arc is a result of an oceanic plate subducting under another oceanic plate.
e. A continental volcanic arc is a result of a continental plate subducting under another continental plate, whereas a volcanic island arc is a result of an oceanic plate subducting under another oceanic plate.
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