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A fixed volcanic hot spot on Earth tends to produce a ________ on a moving plate.


A) series of volcanic peaks
B) high landmass with a fixed location
C) transform fault system
D) submarine canyon and associated abyssal hills
E) trench

F) None of the above
G) D) and E)

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The density of Earth materials ________ as the core is approached.


A) remains the same
B) decreases
C) increases
D) increases then decreases
E) decreases then increases

F) C) and D)
G) B) and D)

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Earth's inner core is liquid whereas its outer core is solid.

A) True
B) False

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Seismic surface waves travel at about the same speed as ocean waves.

A) True
B) False

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The deepest portion of the lithosphere is formed from ________.


A) oceanic basalt
B) terrestrial granite
C) a combination of basalt and granite
D) mantle material
E) the Moho

F) None of the above
G) All of the above

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Hess's 1960s theory of mantle convection and seafloor spreading was essentially correct.

A) True
B) False

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Fracture zones ________.


A) are characterized by volcanism
B) are characterized by earthquakes
C) separate plates that move in different directions
D) are a source of high heat flux
E) None of these is correct.

F) None of the above
G) D) and E)

Correct Answer

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