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Chapter 15: The Moving Continents

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

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