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Plate Tectonics

Practice Test
      
  1.What is the lithosphere?  
  a.   the plates that make up the crust  
  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 and the upper part of the mantle  
  Hint    
      
  2.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 leaves the south pole and enters the north pole  
  d.   when Earth's magnetic field suddenly disappears for short periods of time  
  Hint    
      
  3.What is Pangaea?  
  a.   the largest fault found on Earth  
  b.   Earth's inner core  
  c.   the large landmass in which all continents once were connected  
  d.   the large landmass that all continents are currently forming  
  Hint    
      
  4.What tool does a scientist use to detect magnetic fields?  
  a.   a magnetogram  
  b.   a magnetometer  
  c.   a fieldometer  
  d.   a thermometer  
  Hint    
      
  5.How can crust disappear at the edge of a boundary?  
  a.   Gravity is pulling it down.  
  b.   The other edge of the boundary is being pulled into Earth's core.  
  c.   It is too dense and is sinking into Earth.  
  d.   because new crust is being added to the other edge of the boundary  
  Hint    
      
  6.Who first proposed the theory of continental drift?  
  a.   Harry Hess  
  b.   Alfred Wegener  
  c.   Galileo Galilee  
  d.   Albert Einstein  
  Hint    
      
  7.What do scientists believe is the force behind the plate tectonics theory?  
  a.   the Sun's gravity  
  b.   the movement of the planets  
  c.   gravity slab pull  
  d.   convection currents  
  Hint    
      
  8.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.   Rift valleys are formed from normal faults.  
  c.   Rift valley formation has nothing to do with normal faults.  
  d.   Normal faults occur in the northern hemisphere, but rift valleys only occur in the southern hemisphere.  
  Hint    
      
  9.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 more shallow the water is.  
  d.   The longer it takes a sound wave to return to the ship, the colder the water is.  
  Hint    
      
  10.What is a transform boundary?  
  a.   A transform boundary is when two plates move toward each other.  
  b.   A transform boundary is when two plates slide past one another.  
  c.   A transform boundary is when two plates pull away from each other.  
  d.   A transform boundary is when two plates collide.  
  Hint    
      
  11.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 could swim between continents  
  c.   because the Mesosaurus lived millions of years ago, when scientists believe the continents began to drift  
  d.   because it's unlikely that the Mesosaurus existed on both continents.  
  Hint    
      
  12.What evidence proved that South America, Africa, India, and Australia were once covered by glaciers?  
  a.   leftover portions of glaciers  
  b.   glacial deposits and rock surfaces scarred by glaciers  
  c.   cold climates  
  d.   enormous valleys formed by glaciers  
  Hint    
      
  13.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    
      
  14.How do scientists explain the formation of underwater mountain ranges?  
  a.   continental drift  
  b.   convection currents  
  c.   strike-slip faults  
  d.   seafloor spreading  
  Hint    
      
  15.A divergent boundary is a boundary between two plates that __________.  
  a.   slide along each other  
  b.   converge  
  c.   move away from each other  
  d.   move toward each other  
  Hint    
      
  16.Do two colliding continental plates always cause volcanoes?  
  a.   No, earthquakes always occur when two continental plates collide.  
  b.   No, usually no subduction occurs when continental plates collide.  
  c.   Yes, subduction always occurs when continental plates collide.  
  d.   Yes, subduction always occurs when oceanic plates collide.  
  Hint    
      
  17.What happens to rock around a subducting slab?  
  a.   It goes over the other plate.  
  b.   It disappears from Earth.  
  c.   It combines with the other rock.  
  d.   It goes under the other plate.  
  Hint    
      
  18.What clue supported the continental drift theory?  
  a.   Similar rock structures have been found on different continents.  
  b.   all answers are correct  
  c.   a puzzle-like fit of all the continents  
  d.   Fossils of animals have been found on continents separated by oceans.  
  Hint    
      
  19.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 move in the same directions at the same rate  
  c.   a boundary where rocks on opposite sides of the fault move in opposite or the same directions at different rates  
  d.   a boundary where rocks in the fault never move  
  Hint    
      
  20.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 quickly moved apart to 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 always been located at their current locations on Earth  
  Hint    

 
   
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