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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| Isostacy is largely a force in the earth acting how? | show 🗑
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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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| Magnetic declination is | show 🗑
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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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| show | northwest
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| Magma heated by ocean-continent convergence may form a(n) _____ such as the Aleutian Islands | show 🗑
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| show | magnetic anomalies
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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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| show | Continental drift
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| Sea-floor spreading implies that sea-floor rocks should be ______________. | show 🗑
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| show | by continent-continent convergence
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| show | divergent
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| show | oceanic trenches
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| show | hot spots
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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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| In this hypothesis the two sides of the mid-oceanic ridge are moving in opposite directions like slow conveyor belts. | show 🗑
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| show | convection
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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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| Pangea initially separated into two parts, the southern part is called ____. | show 🗑
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| show | magnetic anomalies
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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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| Alaska’s Aleutian Islands, site of some fierce fighting in WWII, are | show 🗑
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| show | Nazca
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| show | graben
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| Harry Hess proposed that the _______. | show 🗑
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| show | Alfred Wegener
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| The “action” in plate tectonics, meaning a majority of the earthquakes, mountain-building, and volcanism, mostly takes place | show 🗑
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| show | transform
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| show | continent-continent convergence
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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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| show | diverging plate boundary
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| In plate tectonics, intense geologic activity occurs at ____. | show 🗑
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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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| Alternating positive and negative polarity magnetic anomalies in the crust form a stripe-like pattern parallel to _____. | show 🗑
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| show | divergent
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| show | the Red Sea
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| show | It will halt and be “sutured” onto the south side of Asia
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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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| show | lithosphere
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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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