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Plate Tectonics

Practice Test
      
  1.A divergent boundary is a boundary between two plates that __________.  
  a.   move toward each other  
  b.   converge  
  c.   slide along each other  
  d.   move away from each other  
  Hint    
      
  2.What do scientists believe is the force behind the plate tectonics theory?  
  a.   gravity slab pull  
  b.   the Sun's gravity  
  c.   convection currents  
  d.   the movement of the planets  
  Hint    
      
  3.What does plate tectonics cause?  
  a.   forms mountains  
  b.   forms ocean basins  
  c.   causes volcanoes  
  d.   all answers are correct  
  Hint    
      
  4.What is Pangaea?  
  a.   the large landmass that all continents are currently forming  
  b.   the largest fault found on Earth  
  c.   the large landmass in which all continents once were connected  
  d.   Earth's inner core  
  Hint    
      
  5.What is the lithosphere?  
  a.   large, flat stones sitting on top of malleable magma  
  b.   the plates that make up the crust and the upper part of the mantle  
  c.   the upper part of the mantle  
  d.   the plates that make up the crust  
  Hint    
      
  6.How do scientists explain the formation of underwater mountain ranges?  
  a.   convection currents  
  b.   continental drift  
  c.   seafloor spreading  
  d.   strike-slip faults  
  Hint    
      
  7.What is the plate tectonic theory?  
  a.   the belief that Earth's crust and upper mantle is broken into sections  
  b.   the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges  
  c.   the belief that continents have moved slowly apart to their current locations on Earth  
  d.   the belief that Earth is broken into sections that fit together into one sphere  
  Hint    
      
  8.How can crust disappear at the edge of a boundary?  
  a.   because new crust is being added to the other edge of the boundary  
  b.   It is too dense and is sinking into Earth.  
  c.   Gravity is pulling it down.  
  d.   The other edge of the boundary is being pulled into Earth's core.  
  Hint    
      
  9.Do two colliding continental plates always cause volcanoes?  
  a.   No, usually no subduction occurs when continental plates collide.  
  b.   No, earthquakes always occur when two continental plates collide.  
  c.   Yes, subduction always occurs when continental plates collide.  
  d.   Yes, subduction always occurs when oceanic plates collide.  
  Hint    
      
  10.Who first proposed the theory of continental drift?  
  a.   Albert Einstein  
  b.   Galileo Galilee  
  c.   Alfred Wegener  
  d.   Harry Hess  
  Hint    
      
  11.What is a magnetic field reversal?  
  a.   when Earth's magnetic field leaves the south pole and enters the north pole  
  b.   when Earth's magnetic field suddenly disappears for short periods of time  
  c.   when Earth's magnetic field suddenly runs east/west instead of south/north  
  d.   when Earth's magnetic field leaves the north pole and enters the south pole  
  Hint    
      
  12.What kind of movement created the Himalaya Mountains?  
  a.   erosion  
  b.   divergent boundaries  
  c.   reversals of Earth's magnetic field  
  d.   compressional forces  
  Hint    
      
  13.What evidence proved that South America, Africa, India, and Australia were once covered by glaciers?  
  a.   glacial deposits and rock surfaces scarred by glaciers  
  b.   leftover portions of glaciers  
  c.   enormous valleys formed by glaciers  
  d.   cold climates  
  Hint    
      
  14.What is the difference between normal faults and rift valleys?  
  a.   Normal faults occur in the northern hemisphere, but rift valleys only occur in the southern hemisphere.  
  b.   Rift valleys sometimes occur near normal faults, but their formation is not related to these faults.  
  c.   Rift valleys are formed from normal faults.  
  d.   Rift valley formation has nothing to do with normal faults.  
  Hint    
      
  15.What happens when an oceanic plate converges with a continental plate?  
  a.   The denser oceanic plate slides on top of the less dense continental plate.  
  b.   The denser oceanic plate slides under the less dense continental plate.  
  c.   The less dense oceanic plate slides past the denser continental plate.  
  d.   The less dense oceanic plate slides under the denser continental plate.  
  Hint    
      
  16.How does the Mesosaurus fossil evidence support the continental drift theory?  
  a.   because it's unlikely that the Mesosaurus could swim between continents  
  b.   because the Mesosaurus lived millions of years ago, when scientists believe the continents began to drift  
  c.   because it's unlikely that the Mesosaurus existed on both continents.  
  d.   The Mesosaurus fossil evidence does not support the continental drift theory. It proves it wrong.  
  Hint    
      
  17.What are strike-slip faults?  
  a.   a boundary where rocks in the fault never move  
  b.   a boundary where rocks move in the same directions at the same rate  
  c.   a boundary where rocks on the same side of the fault move in the same direction, but at different rates  
  d.   a boundary where rocks on opposite sides of the fault move in opposite or the same directions at different rates  
  Hint    
      
  18.What happens to rock around a subducting slab?  
  a.   It disappears from Earth.  
  b.   It goes over the other plate.  
  c.   It combines with the other rock.  
  d.   It goes under the other plate.  
  Hint    
      
  19.What is the continental drift theory?  
  a.   the belief that continents have moved slowly apart to their current locations on Earth  
  b.   the belief that continents have always been located at their current locations on Earth  
  c.   the belief that continents have quickly moved apart to their current locations on Earth  
  d.   the belief that continents are moving slowly together from their current locations on Earth  
  Hint    
      
  20.What is a transform boundary?  
  a.   A transform boundary is when two plates move toward each other.  
  b.   A transform boundary is when two plates collide.  
  c.   A transform boundary is when two plates slide past one another.  
  d.   A transform boundary is when two plates pull away from each other.  
  Hint    

 
   
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