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Plate Tectonics

Practice Test
      
  1.What does plate tectonics cause?  
  a.   all answers are correct  
  b.   forms ocean basins  
  c.   causes volcanoes  
  d.   forms mountains  
  Hint    
      
  2.How do scientists explain the formation of underwater mountain ranges?  
  a.   strike-slip faults  
  b.   continental drift  
  c.   seafloor spreading  
  d.   convection currents  
  Hint    
      
  3.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 Earth's crust and upper mantle is broken into sections  
  c.   the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges  
  d.   the belief that continents have moved slowly apart to their current locations on Earth  
  Hint    
      
  4.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    
      
  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 new seafloor features are constantly being added due to reversals of Earth's magnetic field.  
  b.   This evidence proved that new seafloor features are constantly being added due to continental drift.  
  c.   This evidence proved that the rocks on the seafloor were older than rocks on continents.  
  d.   This evidence proved that new seafloor features are constantly being added due to seafloor spreading.  
  Hint    
      
  6.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    
      
  7.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    
      
  8.Who first proposed the theory of continental drift?  
  a.   Galileo Galilee  
  b.   Harry Hess  
  c.   Albert Einstein  
  d.   Alfred Wegener  
  Hint    
      
  9.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.   The other edge of the boundary is being pulled into Earth's core.  
  d.   because new crust is being added to the other edge of the boundary  
  Hint    
      
  10.What tool does a scientist use to detect magnetic fields?  
  a.   a magnetometer  
  b.   a magnetogram  
  c.   a thermometer  
  d.   a fieldometer  
  Hint    
      
  11.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    
      
  12.A divergent boundary is a boundary between two plates that __________.  
  a.   move away from each other  
  b.   slide along each other  
  c.   converge  
  d.   move toward each other  
  Hint    
      
  13.What happens when an oceanic plate converges with a continental plate?  
  a.   The denser oceanic plate slides under the less dense continental plate.  
  b.   The less dense oceanic plate slides past the denser 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    
      
  14.What is the lithosphere?  
  a.   the plates that make up the crust and the upper part of the mantle  
  b.   the plates that make up the crust  
  c.   the upper part of the mantle  
  d.   large, flat stones sitting on top of malleable magma  
  Hint    
      
  15.What clue supported the continental drift theory?  
  a.   all answers are correct  
  b.   a puzzle-like fit of all the continents  
  c.   Fossils of animals have been found on continents separated by oceans.  
  d.   Similar rock structures have been found on different continents.  
  Hint    
      
  16.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 always been located at 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 quickly moved apart to their current locations on Earth  
  Hint    
      
  17.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    
      
  18.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 valley formation has nothing to do with normal faults.  
  c.   Rift valleys are formed from normal faults.  
  d.   Rift valleys sometimes occur near normal faults, but their formation is not related to these faults.  
  Hint    
      
  19.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.   No, earthquakes always occur when two continental plates collide.  
  d.   Yes, subduction always occurs when continental plates collide.  
  Hint    
      
  20.What is Pangaea?  
  a.   the large landmass that all continents are currently forming  
  b.   the largest fault found on Earth  
  c.   the large landmass in which all continents once were connected  
  d.   Earth's inner core  
  Hint    

 
   
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