How far has the Meiji seamount moved from the hot spot?
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6000 km |
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4600 km |
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5500 km |
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1500 km |
What direction did the Pacific Plate move originally (i.e. prior to its current northwest movement)?
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Almost due west |
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Almost due south |
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Almost due north |
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To the northeast |
How many years ago, approximately, did the Pacific Plate change direction?
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Less than 1 million years ago |
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A little more than 40 million years ago. |
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71.4 million years ago |
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28.3 million years ago |
Assuming that the current direction of plate movement continues, what will be the eventual fate of the Meiji seamount?
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It will be subducted beneath the Eurasian plate |
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Once it hits the Eurasian plate it will provide enough resistance to cause the plate to change direction again. |
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It will remain in the same area it is today. |
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The volcano that originally formed the seamount will re-activate and a new island will be formed. |
Exercise 2.13a
Which of the following statements accurately describes whether all continental coastlines plate boundaries?
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Yes. All continental coastlines are created by active, subduction zones. |
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No. Some passive continental boundaries occur in subduction zones. |
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No. Some continental boundaries are passive margins, such as those that had been created by divergent (rifting) forces to create spreading centers. |
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Yes. All continental coastlines form when continents rift apart. |
Which of the following accurately describes the west coast of Africa?
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It has a broad continental shelf and is close to an ocean trench. |
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It has a narrow continental shelf and is close to an ocean trench |
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It has a broad continental shelf and is far away from an ocean trench. |
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It has a narrow continental shelf and is far away from an ocean trench. |
