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Formation of Hawaiian Island Chain by Hotspot Volcanism
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1

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What is the source of magma that forms volcanic islands over a hotspot?
A)melting of rock in the continental crust
B)melting of rock in the oceanic crust
C)melting of rock in the asthenosphere
D)melting of rock in the outer core
E)any of the above
2
What happens to a volcanic island as it moves off of the hotspot?
A)the island subsides
B)the volcanoes become inactive
C)fringing reefs develop
D)the island erodes
E)all of the above
3
Why do old volcanic islands subside beneath sea level?
A)as the volcano cools, it sinks into the seafloor
B)as the plate moves off of the hotspot, it cools and subsides on the mantle
C)erosion wears the island down below sea level
D)coral reef development erodes the island below sea level
E)all of the above
4
What part of Midway Atoll forms the island presently above sea level?
A)the eroded summit of the volcano
B)the dead coral capping the eroded volcano
C)the beach deposits eroded from the volcano
D)the old lava flows from the flanks of the volcano
E)both a and d
5
Which of the Hawaiian Islands has the youngest volcanic rock?
A)Maui
B)Oahu
C)Kauai
D)Hawaii
E)Molokai





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