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Plate Tectonics

Practice Test
      
  1.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    
      
  2.What clue supported the continental drift theory?  
  a.   Similar rock structures have been found on different continents.  
  b.   Fossils of animals have been found on continents separated by oceans.  
  c.   a puzzle-like fit of all the continents  
  d.   all answers are correct  
  Hint    
      
  3.What kind of movement created the Himalaya Mountains?  
  a.   reversals of Earth's magnetic field  
  b.   erosion  
  c.   compressional forces  
  d.   divergent boundaries  
  Hint    
      
  4.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 valleys are formed from normal faults.  
  d.   Rift valley formation has nothing to do with normal faults.  
  Hint    
      
  5.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 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 continents have moved slowly apart to their current locations on Earth  
  Hint    
      
  6.How can crust disappear at the edge of a boundary?  
  a.   It is too dense and is sinking into Earth.  
  b.   because new crust is being added to the other edge of the boundary  
  c.   The other edge of the boundary is being pulled into Earth's core.  
  d.   Gravity is pulling it down.  
  Hint    
      
  7.Do two colliding continental plates always cause volcanoes?  
  a.   Yes, subduction always occurs when oceanic plates collide.  
  b.   No, earthquakes always occur when two continental plates collide.  
  c.   No, usually no subduction occurs when continental plates collide.  
  d.   Yes, subduction always occurs when continental plates collide.  
  Hint    
      
  8.What happens to rock around a subducting slab?  
  a.   It goes over the other plate.  
  b.   It goes under the other plate.  
  c.   It disappears from Earth.  
  d.   It combines with the other rock.  
  Hint    
      
  9.How do scientists explain the formation of underwater mountain ranges?  
  a.   strike-slip faults  
  b.   seafloor spreading  
  c.   continental drift  
  d.   convection currents  
  Hint    
      
  10.Who first proposed the theory of continental drift?  
  a.   Albert Einstein  
  b.   Alfred Wegener  
  c.   Galileo Galilee  
  d.   Harry Hess  
  Hint    
      
  11.What does plate tectonics cause?  
  a.   causes volcanoes  
  b.   forms ocean basins  
  c.   forms mountains  
  d.   all answers are correct  
  Hint    
      
  12.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 always been located at their current locations on Earth  
  d.   the belief that continents have moved slowly apart to their current locations on Earth  
  Hint    
      
  13.What is the lithosphere?  
  a.   the upper part of the mantle  
  b.   the plates that make up the crust  
  c.   the plates that make up the crust and the upper part of the mantle  
  d.   large, flat stones sitting on top of malleable magma  
  Hint    
      
  14.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 runs east/west instead of south/north  
  c.   when Earth's magnetic field suddenly disappears for short periods of time  
  d.   when Earth's magnetic field leaves the north pole and enters the south pole  
  Hint    
      
  15.What happens when an oceanic plate converges with a continental plate?  
  a.   The less dense oceanic plate slides past the denser continental plate.  
  b.   The denser oceanic plate slides under the less dense continental plate.  
  c.   The less dense oceanic plate slides under the denser continental plate.  
  d.   The denser oceanic plate slides on top of the less dense continental plate.  
  Hint    
      
  16.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 on the same side of the fault move in the same direction, but at different rates  
  c.   a boundary where rocks in the fault never move  
  d.   a boundary where rocks move in the same directions at the same rate  
  Hint    
      
  17.What is a transform boundary?  
  a.   A transform boundary is when two plates slide past one another.  
  b.   A transform boundary is when two plates collide.  
  c.   A transform boundary is when two plates pull away from each other.  
  d.   A transform boundary is when two plates move toward each other.  
  Hint    
      
  18.What tool does a scientist use to detect magnetic fields?  
  a.   a magnetogram  
  b.   a fieldometer  
  c.   a thermometer  
  d.   a magnetometer  
  Hint    
      
  19.What is Pangaea?  
  a.   Earth's inner core  
  b.   the largest fault found on Earth  
  c.   the large landmass that all continents are currently forming  
  d.   the large landmass in which all continents once were connected  
  Hint    
      
  20.How can Earth's plates move?  
  a.   They only collide or slide along each other.  
  b.   They can collide, pull apart, or slide against each other.  
  c.   They only can move toward each other.  
  d.   They only converge or diverge.  
  Hint    

 
   
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