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Plate Tectonics

Practice Test
      
  1.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 valley formation has nothing to do with normal faults.  
  d.   Rift valleys are formed from normal faults.  
  Hint    
      
  2.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    
      
  3.What is a transform boundary?  
  a.   A transform boundary is when two plates collide.  
  b.   A transform boundary is when two plates pull away from each other.  
  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    
      
  4.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 are moving slowly together from their current locations on Earth  
  c.   the belief that continents have always been located at their current locations on Earth  
  d.   the belief that continents have quickly moved apart to their current locations on Earth  
  Hint    
      
  5.What do scientists believe is the force behind the plate tectonics theory?  
  a.   convection currents  
  b.   the Sun's gravity  
  c.   the movement of the planets  
  d.   gravity slab pull  
  Hint    
      
  6.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 colder the water is.  
  c.   The longer it takes a sound wave to return to the ship, the more shallow the water is.  
  d.   The less time it takes a sound wave to return to the ship, the deeper the water is.  
  Hint    
      
  7.A divergent boundary is a boundary between two plates that __________.  
  a.   slide along each other  
  b.   move away from each other  
  c.   converge  
  d.   move toward each other  
  Hint    
      
  8.Who first proposed the theory of continental drift?  
  a.   Galileo Galilee  
  b.   Harry Hess  
  c.   Alfred Wegener  
  d.   Albert Einstein  
  Hint    
      
  9.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 plates that make up the crust  
  d.   the upper part of the mantle  
  Hint    
      
  10.What are strike-slip faults?  
  a.   a boundary where rocks on the same side of the fault move in the same direction, but at different rates  
  b.   a boundary where rocks on opposite sides of the fault move in opposite or the same directions at different rates  
  c.   a boundary where rocks move in the same directions at the same rate  
  d.   a boundary where rocks in the fault never move  
  Hint    
      
  11.How can crust disappear at the edge of a boundary?  
  a.   Gravity is pulling it down.  
  b.   It is too dense and is sinking into Earth.  
  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    
      
  12.What evidence proved that South America, Africa, India, and Australia were once covered by glaciers?  
  a.   cold climates  
  b.   leftover portions of glaciers  
  c.   glacial deposits and rock surfaces scarred by glaciers  
  d.   enormous valleys formed by glaciers  
  Hint    
      
  13.What is Pangaea?  
  a.   Earth's inner core  
  b.   the large landmass that all continents are currently forming  
  c.   the largest fault found on Earth  
  d.   the large landmass in which all continents once were connected  
  Hint    
      
  14.What is the plate tectonic theory?  
  a.   the belief that Earth is broken into sections that fit together into one sphere  
  b.   the belief that continents have moved slowly apart to their current locations on Earth  
  c.   the belief that Earth's crust and upper mantle is broken into sections  
  d.   the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges  
  Hint    
      
  15.How can Earth's plates move?  
  a.   They can collide, pull apart, or slide against each other.  
  b.   They only can move toward each other.  
  c.   They only collide or slide along each other.  
  d.   They only converge or diverge.  
  Hint    
      
  16.How do scientists explain the formation of underwater mountain ranges?  
  a.   continental drift  
  b.   strike-slip faults  
  c.   convection currents  
  d.   seafloor spreading  
  Hint    
      
  17.What kind of movement created the Himalaya Mountains?  
  a.   divergent boundaries  
  b.   compressional forces  
  c.   erosion  
  d.   reversals of Earth's magnetic field  
  Hint    
      
  18.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 leaves the south pole and enters the north pole  
  c.   when Earth's magnetic field leaves the north pole and enters the south pole  
  d.   when Earth's magnetic field suddenly runs east/west instead of south/north  
  Hint    
      
  19.Do two colliding continental plates always cause volcanoes?  
  a.   No, usually no subduction occurs when continental plates collide.  
  b.   Yes, subduction always occurs when continental plates collide.  
  c.   Yes, subduction always occurs when oceanic plates collide.  
  d.   No, earthquakes always occur when two continental plates collide.  
  Hint    
      
  20.Why was the discovery of no rocks older than 2 billion years old on the ocean floor so important?  
  a.   This evidence proved that the rocks on the seafloor were older than rocks on continents.  
  b.   This evidence proved that new seafloor features are constantly being added due to reversals of Earth's magnetic field.  
  c.   This evidence proved that new seafloor features are constantly being added due to continental drift.  
  d.   This evidence proved that new seafloor features are constantly being added due to seafloor spreading.  
  Hint    

 
   
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