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Plate Tectonics

Practice Test
      
  1.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.   cold climates  
  c.   leftover portions of glaciers  
  d.   enormous valleys formed by glaciers  
  Hint    
      
  2.How do scientists use sound waves to figure out the shape of the ocean floor?  
  a.   The longer it takes a sound wave to return to the ship, the deeper the water is.  
  b.   The longer it takes a sound wave to return to the ship, the more shallow the water is.  
  c.   The less time it takes a sound wave to return to the ship, the deeper the water is.  
  d.   The longer it takes a sound wave to return to the ship, the colder the water is.  
  Hint    
      
  3.What is a transform boundary?  
  a.   A transform boundary is when two plates pull away from each other.  
  b.   A transform boundary is when two plates move toward each other.  
  c.   A transform boundary is when two plates slide past one another.  
  d.   A transform boundary is when two plates collide.  
  Hint    
      
  4.What kind of movement created the Himalaya Mountains?  
  a.   divergent boundaries  
  b.   compressional forces  
  c.   reversals of Earth's magnetic field  
  d.   erosion  
  Hint    
      
  5.What is Pangaea?  
  a.   the large landmass that all continents are currently forming  
  b.   Earth's inner core  
  c.   the largest fault found on Earth  
  d.   the large landmass in which all continents once were connected  
  Hint    
      
  6.What is the lithosphere?  
  a.   the plates that make up the crust and the upper part of the mantle  
  b.   large, flat stones sitting on top of malleable magma  
  c.   the upper part of the mantle  
  d.   the plates that make up the crust  
  Hint    
      
  7.What happens when an oceanic plate converges with a continental plate?  
  a.   The less dense oceanic plate slides under the denser 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 denser oceanic plate slides on top of the less dense continental plate.  
  Hint    
      
  8.A divergent boundary is a boundary between two plates that __________.  
  a.   slide along each other  
  b.   move toward each other  
  c.   converge  
  d.   move away from each other  
  Hint    
      
  9.What is a magnetic field reversal?  
  a.   when Earth's magnetic field suddenly disappears for short periods of time  
  b.   when Earth's magnetic field suddenly runs east/west instead of south/north  
  c.   when Earth's magnetic field leaves the south pole and enters the north pole  
  d.   when Earth's magnetic field leaves the north pole and enters the south pole  
  Hint    
      
  10.What is the difference between normal faults and rift valleys?  
  a.   Rift valleys are formed from normal faults.  
  b.   Rift valley formation has nothing to do with normal faults.  
  c.   Rift valleys sometimes occur near normal faults, but their formation is not related to these faults.  
  d.   Normal faults occur in the northern hemisphere, but rift valleys only occur in the southern hemisphere.  
  Hint    
      
  11.What is the plate tectonic theory?  
  a.   the belief that Earth's crust and upper mantle is broken into sections  
  b.   the belief that continents have moved slowly apart to their current locations on Earth  
  c.   the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges  
  d.   the belief that Earth is broken into sections that fit together into one sphere  
  Hint    
      
  12.What happens to rock around a subducting slab?  
  a.   It goes under the other plate.  
  b.   It goes over the other plate.  
  c.   It disappears from Earth.  
  d.   It combines with the other rock.  
  Hint    
      
  13.What does plate tectonics cause?  
  a.   forms ocean basins  
  b.   forms mountains  
  c.   all answers are correct  
  d.   causes volcanoes  
  Hint    
      
  14.What clue supported the continental drift theory?  
  a.   Similar rock structures have been found on different continents.  
  b.   a puzzle-like fit of all the continents  
  c.   Fossils of animals have been found on continents separated by oceans.  
  d.   all answers are correct  
  Hint    
      
  15.What is the continental drift theory?  
  a.   the belief that continents are moving slowly together from 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 moved slowly apart to their current locations on Earth  
  d.   the belief that continents have quickly moved apart to their current locations on Earth  
  Hint    
      
  16.How does the Mesosaurus fossil evidence support the continental drift theory?  
  a.   The Mesosaurus fossil evidence does not support the continental drift theory. It proves it wrong.  
  b.   because it's unlikely that the Mesosaurus existed on both continents.  
  c.   because it's unlikely that the Mesosaurus could swim between continents  
  d.   because the Mesosaurus lived millions of years ago, when scientists believe the continents began to drift  
  Hint    
      
  17.Who first proposed the theory of continental drift?  
  a.   Albert Einstein  
  b.   Alfred Wegener  
  c.   Harry Hess  
  d.   Galileo Galilee  
  Hint    
      
  18.How do scientists explain the formation of underwater mountain ranges?  
  a.   strike-slip faults  
  b.   continental drift  
  c.   convection currents  
  d.   seafloor spreading  
  Hint    
      
  19.Do two colliding continental plates always cause volcanoes?  
  a.   No, earthquakes always occur when two continental plates collide.  
  b.   Yes, subduction always occurs when continental plates collide.  
  c.   No, usually no subduction occurs when continental plates collide.  
  d.   Yes, subduction always occurs when oceanic plates collide.  
  Hint    
      
  20.What tool does a scientist use to detect magnetic fields?  
  a.   a magnetogram  
  b.   a magnetometer  
  c.   a fieldometer  
  d.   a thermometer  
  Hint    

 
   
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