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31 of them!

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
vibrations that travel through Earth carrying the energy released during an earthquake   sesmic waves  
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the force exerted on a surface divided by the total area over which force is exerted   pressure  
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the layer of rock that forms Earth's outer surface   crust  
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a dark dense igneous rock with a fine texture found in oceanic crust   basalt  
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a usually light colored igneous rock that is found in continental crust   granite  
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the layer of hot solid material between Earth's crust and core   mantle  
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a rigid layer made up of the uppermost part of the mantle and the crust   lithosphere  
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the soft layer of the mantle on which the lithosphere floats   asethenosphere  
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a layer of molten iron and nickel that surrounds the inner core of Earth   outer core  
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a dense sphere of solid iron and nickelat the center of Earth   inner core  
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the direct transfer of energy through space by electromagnetic waves   radiation  
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the direct transfer of thermal energy from one substance to another substance that is touching   conduction  
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the transfer of thermal energy by the movement of a fluid   convection  
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the amount of mass inn a substance in a given volume; mass per unit volume   density  
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the movement of a flud by differences in temature that transfers heat from one part of the fluid to another   convection current  
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the hypothesis that the continents slowly move across Earth's surface   continental drift  
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the name of the single landmass that broke apart 200 million years agoand gave rise to todays continents   pangaea  
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a trace an acient organism that has been preserved in a rock   fossil  
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an undersea mountain chain where no ocean floor is produced   mid ocean ridge  
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a device that determined the distance of an object under water by recording echos of sound waves   sonar  
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the process by which molten material adds new oceanic crust to the ocean floor   sea floor spreading  
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a deep valley among the ocean floor beneath which oceanic crust slowly sinks toward the matle   deep ocean trench  
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the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary   subduction  
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a section of the lithosphere that slowly moves over the asthenosphere carrying pieces of of continental and oceanic crust   plate  
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a well tested concept that explains a wide rang of observations   scientific theory  
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the theory that pieces of Earth's lithosphere are in constant motion driven by convection currents in the mantle   plate tectonics  
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a break or crack in Earth's lithosphere along which the rocks move   fault  
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aa plate boundary where two platesmove away from eachother   divergent boundary  
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a deep valley that forms where two plates move apart   rift valley  
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a plate bboundary where two plates move toward eachother   convergent boundary  
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a plate boundary where two plates move past eachother in opposite directions   transform boundaries  
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