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Chapter 15: The Moving Continents

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

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