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Chapter 15: The Moving Continents

Practice Test
  1.What is the origin of movement of lithospheric plates? In other words, what powers plate tectonics?  
  a.   divergence  
  b.   subduction  
  c.   conduction  
  d.   convection  
  2.Special deposits of rock can be found where Africa, India, Australia, and South America were once joined. These deposits suggest a colder climate than is currently present at these locations. What do scientists suggest deposited these rocks?  
  a.   oceans  
  b.   streams  
  c.   glaciers  
  d.   lakes  
  3.Which of the following occurs along convergent boundaries?  
  a.   volcanoes  
  b.   mountains  
  c.   glaciers  
  d.   all of the above  
  4.How have scientists learned about the deep interior of Earth beneath the crust?  
  a.   They have sampled rock from mines located deep in the mantle.  
  b.   mountains  
  c.   glaciers  
  d.   all of the above  
  5.In which layer are convection cells moving, and in turn, driving the movement of lithospheric plates?  
  a.   continental crust  
  b.   oceanic crust  
  c.   trench  
  d.   mantle  
  6.Which is the outermost layer of Earth?  
  a.   core  
  b.   skin  
  c.   crust  
  d.   mantle  
  7.Which of the following is made of material that is lowest in density?  
  a.   mantle  
  b.   oceanic crust  
  c.   core  
  d.   continental crust  
  8.The lithosphere, which makes up Earth's plates, is composed of what two layers?  
  a.   crust and upper mantle  
  b.   asthenosphere and upper mantle  
  c.   oceanic crust and lower mantle  
  d.   asthenosphere and crust  
  9.How did the Hawaiian Islands form?  
  a.   The Pacific plate was split apart.  
  b.   The Pacific plate was forced under another plate.  
  c.   The Pacific plate collided with the Eurasian plate to form mountains.  
  d.   The Pacific plate moved over a hot spot.  
  10.What evidence did Wegener suggest that supported the hypothesis of continental drift?  
  a.   the locations of Mesosaurus fossils  
  b.   the locations of Glossopteris fossils  
  c.   the puzzle-like fit of the continents  
  d.   All of the above.  
  11.How do plates move along transform boundaries?  
  a.   They are forced together to form trenches.  
  b.   They collide head on into one another.  
  c.   They move away from one another.  
  d.   They move past one another in opposite directions or in the same direction at different rates.  
  12.What happens to a portion of a plate when it is forced below another plate?  
  a.   It forms a divergent boundary.  
  b.   It reverses in magnetic polarity.  
  c.   It partially melts to form magma.  
  d.   It separates to form a rift valley.  
  13.Where does separation of oceanic crust occur, and where is new ocean floor created?  
  a.   trenches  
  b.   mid-ocean ridges  
  c.   the Himalaya  
  d.   convergent boundaries  
  14.What are mountain chains thousands of kilometers long on the ocean floor known as?  
  a.   hot spots  
  b.   trenches  
  c.   rift valleys  
  d.   mid-ocean ridges  
  15.Which puttylike layer is located just beneath Earth's plates?  
  a.   lithosphere  
  b.   asthenosphere  
  c.   oceanic crust  
  d.   outer core  

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