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Plate Tectonics

Practice Test
      
  1.What is a magnetic field reversal?  
  a.   when Earth's magnetic field suddenly runs east/west instead of south/north  
  b.   when Earth's magnetic field leaves the north pole and enters the south pole  
  c.   when Earth's magnetic field suddenly disappears for short periods of time  
  d.   when Earth's magnetic field leaves the south pole and enters the north pole  
  Hint    
      
  2.What is Pangaea?  
  a.   the large landmass that all continents are currently forming  
  b.   the large landmass in which all continents once were connected  
  c.   the largest fault found on Earth  
  d.   Earth's inner core  
  Hint    
      
  3.How can Earth's plates move?  
  a.   They can collide, pull apart, or slide against each other.  
  b.   They only converge or diverge.  
  c.   They only collide or slide along each other.  
  d.   They only can move toward each other.  
  Hint    
      
  4.What tool does a scientist use to detect magnetic fields?  
  a.   a fieldometer  
  b.   a magnetometer  
  c.   a thermometer  
  d.   a magnetogram  
  Hint    
      
  5.How can crust disappear at the edge of a boundary?  
  a.   It is too dense and is sinking into Earth.  
  b.   Gravity is pulling it down.  
  c.   because new crust is being added to the other edge of the boundary  
  d.   The other edge of the boundary is being pulled into Earth's core.  
  Hint    
      
  6.How do scientists explain the formation of underwater mountain ranges?  
  a.   continental drift  
  b.   seafloor spreading  
  c.   strike-slip faults  
  d.   convection currents  
  Hint    
      
  7.What clue supported the continental drift theory?  
  a.   all answers are correct  
  b.   a puzzle-like fit of all the continents  
  c.   Similar rock structures have been found on different continents.  
  d.   Fossils of animals have been found on continents separated by oceans.  
  Hint    
      
  8.What is the plate tectonic theory?  
  a.   the belief that Earth's crust and upper mantle is broken into sections  
  b.   the belief that Earth is broken into sections that fit together into one sphere  
  c.   the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges  
  d.   the belief that continents have moved slowly apart to their current locations on Earth  
  Hint    
      
  9.What kind of movement created the Himalaya Mountains?  
  a.   erosion  
  b.   compressional forces  
  c.   reversals of Earth's magnetic field  
  d.   divergent boundaries  
  Hint    
      
  10.A divergent boundary is a boundary between two plates that __________.  
  a.   move toward each other  
  b.   move away from each other  
  c.   slide along each other  
  d.   converge  
  Hint    
      
  11.What are strike-slip faults?  
  a.   a boundary where rocks on opposite sides of the fault move in opposite or the same directions at different rates  
  b.   a boundary where rocks in the fault never move  
  c.   a boundary where rocks move in the same directions at the same rate  
  d.   a boundary where rocks on the same side of the fault move in the same direction, but at different rates  
  Hint    
      
  12.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 denser oceanic plate slides on top of the less dense continental plate.  
  d.   The less dense oceanic plate slides past the denser continental plate.  
  Hint    
      
  13.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 are moving slowly together from their current locations on Earth  
  d.   the belief that continents have quickly moved apart to their current locations on Earth  
  Hint    
      
  14.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 collide.  
  c.   A transform boundary is when two plates move toward each other.  
  d.   A transform boundary is when two plates slide past one another.  
  Hint    
      
  15.What is the lithosphere?  
  a.   the plates that make up the crust and the upper part of the mantle  
  b.   the upper part of the mantle  
  c.   the plates that make up the crust  
  d.   large, flat stones sitting on top of malleable magma  
  Hint    
      
  16.What happens to rock around a subducting slab?  
  a.   It combines with the other rock.  
  b.   It disappears from Earth.  
  c.   It goes under the other plate.  
  d.   It goes over the other plate.  
  Hint    
      
  17.What evidence proved that South America, Africa, India, and Australia were once covered by glaciers?  
  a.   cold climates  
  b.   glacial deposits and rock surfaces scarred by glaciers  
  c.   leftover portions of glaciers  
  d.   enormous valleys formed by glaciers  
  Hint    
      
  18.Who first proposed the theory of continental drift?  
  a.   Galileo Galilee  
  b.   Harry Hess  
  c.   Alfred Wegener  
  d.   Albert Einstein  
  Hint    
      
  19.How do scientists use sound waves to figure out the shape of the ocean floor?  
  a.   The less time 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 deeper the water is.  
  c.   The longer it takes a sound wave to return to the ship, the colder the water is.  
  d.   The longer it takes a sound wave to return to the ship, the more shallow the water is.  
  Hint    
      
  20.What is the difference between normal faults and rift valleys?  
  a.   Rift valleys sometimes occur near normal faults, but their formation is not related to these faults.  
  b.   Normal faults occur in the northern hemisphere, but rift valleys only occur in the southern hemisphere.  
  c.   Rift valley formation has nothing to do with normal faults.  
  d.   Rift valleys are formed from normal faults.  
  Hint    

 
   
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