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Plate Tectonics

Practice Test
      
  1.A divergent boundary is a boundary between two plates that __________.  
  a.   move away from each other  
  b.   move toward each other  
  c.   slide along each other  
  d.   converge  
  Hint    
      
  2.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 quickly moved apart to 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 always been located at their current locations on Earth  
  Hint    
      
  3.What are strike-slip faults?  
  a.   a boundary where rocks move in the same directions at the same rate  
  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 on the same side of the fault move in the same direction, but at different rates  
  d.   a boundary where rocks in the fault never move  
  Hint    
      
  4.What happens to rock around a subducting slab?  
  a.   It disappears from Earth.  
  b.   It goes under the other plate.  
  c.   It combines with the other rock.  
  d.   It goes over the other plate.  
  Hint    
      
  5.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 continental drift.  
  c.   This evidence proved that new seafloor features are constantly being added due to reversals of Earth's magnetic field.  
  d.   This evidence proved that new seafloor features are constantly being added due to seafloor spreading.  
  Hint    
      
  6.What is the difference between normal faults and rift valleys?  
  a.   Rift valleys are formed from normal faults.  
  b.   Rift valleys sometimes occur near normal faults, but their formation is not related to these faults.  
  c.   Normal faults occur in the northern hemisphere, but rift valleys only occur in the southern hemisphere.  
  d.   Rift valley formation has nothing to do with normal faults.  
  Hint    
      
  7.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    
      
  8.How do scientists explain the formation of underwater mountain ranges?  
  a.   strike-slip faults  
  b.   seafloor spreading  
  c.   convection currents  
  d.   continental drift  
  Hint    
      
  9.What tool does a scientist use to detect magnetic fields?  
  a.   a fieldometer  
  b.   a thermometer  
  c.   a magnetometer  
  d.   a magnetogram  
  Hint    
      
  10.How can Earth's plates move?  
  a.   They only collide or slide along each other.  
  b.   They only converge or diverge.  
  c.   They can collide, pull apart, or slide against each other.  
  d.   They only can move toward each other.  
  Hint    
      
  11.What does plate tectonics cause?  
  a.   all answers are correct  
  b.   forms mountains  
  c.   causes volcanoes  
  d.   forms ocean basins  
  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 on top of the less dense continental plate.  
  c.   The denser oceanic plate slides under the less dense continental plate.  
  d.   The less dense oceanic plate slides past the denser continental plate.  
  Hint    
      
  13.What is the plate tectonic theory?  
  a.   the belief that continents have moved slowly apart to their current locations on Earth  
  b.   the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges  
  c.   the belief that Earth's crust and upper mantle is broken into sections  
  d.   the belief that Earth is broken into sections that fit together into one sphere  
  Hint    
      
  14.Who first proposed the theory of continental drift?  
  a.   Albert Einstein  
  b.   Galileo Galilee  
  c.   Harry Hess  
  d.   Alfred Wegener  
  Hint    
      
  15.Do two colliding continental plates always cause volcanoes?  
  a.   Yes, subduction always occurs when oceanic plates collide.  
  b.   No, usually no subduction occurs when continental plates collide.  
  c.   Yes, subduction always occurs when continental plates collide.  
  d.   No, earthquakes always occur when two continental plates collide.  
  Hint    
      
  16.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.   Earth's inner core  
  d.   the largest fault found on Earth  
  Hint    
      
  17.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 colder the water is.  
  b.   The less time 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 more shallow the water is.  
  d.   The longer it takes a sound wave to return to the ship, the deeper the water is.  
  Hint    
      
  18.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    
      
  19.What kind of movement created the Himalaya Mountains?  
  a.   compressional forces  
  b.   divergent boundaries  
  c.   reversals of Earth's magnetic field  
  d.   erosion  
  Hint    
      
  20.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    

 
   
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