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Plate Tectonics

Practice Test
      
  1.How does the Mesosaurus fossil evidence support the continental drift theory?  
  a.   because it's unlikely that the Mesosaurus existed on both continents.  
  b.   because it's unlikely that the Mesosaurus could swim between continents  
  c.   The Mesosaurus fossil evidence does not support the continental drift theory. It proves it wrong.  
  d.   because the Mesosaurus lived millions of years ago, when scientists believe the continents began to drift  
  Hint    
      
  2.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 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 colder the water is.  
  d.   The longer it takes a sound wave to return to the ship, the more shallow the water is.  
  Hint    
      
  3.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 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 disappears for short periods of time  
  Hint    
      
  4.What is the continental drift theory?  
  a.   the belief that continents have quickly moved apart to their current locations on Earth  
  b.   the belief that continents have moved slowly 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 are moving slowly together from their current locations on Earth  
  Hint    
      
  5.What does plate tectonics cause?  
  a.   all answers are correct  
  b.   causes volcanoes  
  c.   forms ocean basins  
  d.   forms mountains  
  Hint    
      
  6.A divergent boundary is a boundary between two plates that __________.  
  a.   slide along each other  
  b.   move away from each other  
  c.   move toward each other  
  d.   converge  
  Hint    
      
  7.What is the difference between normal faults and rift valleys?  
  a.   Rift valleys are formed from normal faults.  
  b.   Rift valley formation has nothing to do with normal faults.  
  c.   Rift valleys sometimes occur near normal faults, but their formation is not related to these faults.  
  d.   Normal faults occur in the northern hemisphere, but rift valleys only occur in the southern hemisphere.  
  Hint    
      
  8.What is the lithosphere?  
  a.   large, flat stones sitting on top of malleable magma  
  b.   the plates that make up the crust  
  c.   the plates that make up the crust and the upper part of the mantle  
  d.   the upper part of the mantle  
  Hint    
      
  9.Why was the discovery of no rocks older than 2 billion years old on the ocean floor so important?  
  a.   This evidence proved that new seafloor features are constantly being added due to continental drift.  
  b.   This evidence proved that the rocks on the seafloor were older than rocks on continents.  
  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    
      
  10.What tool does a scientist use to detect magnetic fields?  
  a.   a fieldometer  
  b.   a magnetogram  
  c.   a magnetometer  
  d.   a thermometer  
  Hint    
      
  11.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    
      
  12.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 continents have moved slowly apart to their current locations on Earth  
  d.   the belief that Earth's crust and upper mantle is broken into sections  
  Hint    
      
  13.How do scientists explain the formation of underwater mountain ranges?  
  a.   convection currents  
  b.   seafloor spreading  
  c.   strike-slip faults  
  d.   continental drift  
  Hint    
      
  14.What evidence proved that South America, Africa, India, and Australia were once covered by glaciers?  
  a.   enormous valleys formed by glaciers  
  b.   glacial deposits and rock surfaces scarred by glaciers  
  c.   leftover portions of glaciers  
  d.   cold climates  
  Hint    
      
  15.What happens when an oceanic plate converges with a continental plate?  
  a.   The denser oceanic plate slides on top of the less dense continental plate.  
  b.   The denser oceanic plate slides under the less dense continental plate.  
  c.   The less dense oceanic plate slides past the denser continental plate.  
  d.   The less dense oceanic plate slides under the denser continental plate.  
  Hint    
      
  16.What is Pangaea?  
  a.   Earth's inner core  
  b.   the largest fault found on Earth  
  c.   the large landmass in which all continents once were connected  
  d.   the large landmass that all continents are currently forming  
  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.Do two colliding continental plates always cause volcanoes?  
  a.   Yes, subduction always occurs when continental plates collide.  
  b.   No, earthquakes always occur when two continental plates collide.  
  c.   Yes, subduction always occurs when oceanic plates collide.  
  d.   No, usually no subduction occurs when continental plates collide.  
  Hint    
      
  19.What is a transform boundary?  
  a.   A transform boundary is when two plates collide.  
  b.   A transform boundary is when two plates move toward each other.  
  c.   A transform boundary is when two plates slide past one another.  
  d.   A transform boundary is when two plates pull away from each other.  
  Hint    
      
  20.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 can move toward each other.  
  d.   They only collide or slide along each other.  
  Hint    

 
   
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