Plate Techtonics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | none above
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| The head of large plumes that form "hot spots" may cause uplift and ____. | show 🗑
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| There’q s one place on earth where you can stand on a large island, be above a hot spot, and see MOR all simultaneously. That place is | show 🗑
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| show | the angle between the magnetic pole and the geographic pole
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| Evidence in support of continental drift includes ____. | show 🗑
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| This type of plate boundary the two plates can consist of ocean-ocean, ocean-continent, or continent-continent crust. | show 🗑
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| show | accretionary wedge
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| The isotopic ages of Hawaiian Island basalts increase regularly to the ____. | show 🗑
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| show | magmatic (island) arc
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| Marine geologists can predict the age of igneous rocks of the sea floor by measuring _____. | show 🗑
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| The portion of a fracture zone between two offset portions of ridge crest is called a ____. | show 🗑
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| ____ is the idea that continents move freely over Earth's surface, changing their positions relative to one another. | show 🗑
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| Sea-floor spreading implies that sea-floor rocks should be ______________. | show 🗑
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| The Himalayan Mountains are thought to have formed ____. | show 🗑
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| show | divergent
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| show | oceanic trenches
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| Plumes form ______ that are related to areas of active volcanism such as Iceland, Yellowstone and Hawaii. | show 🗑
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| show | ridge crests
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| The apparent movement of the magnetic poles through geologic time is called _____. | show 🗑
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| show | mid-oceanic ridges
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| show | plate tectonics
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| show | sea floor spreading
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| Hess's original hypothesis was that sea-floor spreading is driven by deep mantle ____. | show 🗑
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| show | 1-12 cm
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| Measured rates of sea-floor spreading range from ______ cm/year. | show 🗑
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| show | Gondwanaland
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| After World War II, using extremely sensitive instruments originally designed to detect submarines, it was discovered that the seafloor displayed what? | show 🗑
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| show | Vine and Matthews
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| Wegener reassembled the continents to form the super continent _____. | show 🗑
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| show | a volcanic island arc
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| The Peru-Chile trench is moving over the ________ Plate as South America moves west. | show 🗑
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| show | graben
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| Harry Hess proposed that the _______. | show 🗑
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| In the early 1900s the German meteorologist _____ made a strong case for continental drift. | show 🗑
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| show | near plate edges
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| These plate boundaries are marked by shallow-focus earthquakes in a narrow zone for a single fault or in a broad zone for a group of parallel faults | show 🗑
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| One kind of convergent plate boundary is ____. | show 🗑
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| When a descending plate reaches a depth of _______ km, magma is generated in the overlying asthenosphere. | show 🗑
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| The Rift Valley in East Africa is an example of a _____. | show 🗑
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| show | plate boundaries
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| show | convergent boundaries
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| show | GPS
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| show | a right lateral transform fault
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| show | mid-oceanic ridges
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| A _____ plate boundary is where plates are moving away from each other. | show 🗑
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| Divergent plate boundaries can occur where spreading occurs under a continent, for example ___. | show 🗑
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| India began colliding with Asia about 30 million years ago. The most likely thing that will happen in the geologic future is that | show 🗑
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| ____ volcanoes can be found along subducting plate boundaries. | show 🗑
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| One possible mechanism for plate tectonic drive is ____. | show 🗑
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| The ___ includes rocks of the crust and uppermost mantle. | show 🗑
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| What may well happen to old, subducted lithospheric plates (OCTL) | show 🗑
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Created by:
Thomas.Siu
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