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Plate Tectonics

Practice Test
      
  1.What evidence proved that South America, Africa, India, and Australia were once covered by glaciers?  
  a.   enormous valleys formed by glaciers  
  b.   leftover portions of glaciers  
  c.   cold climates  
  d.   glacial deposits and rock surfaces scarred by glaciers  
  Hint    
      
  2.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.   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    
      
  3.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 new seafloor features are constantly being added due to reversals of Earth's magnetic field.  
  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    
      
  4.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    
      
  5.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    
      
  6.What kind of movement created the Himalaya Mountains?  
  a.   compressional forces  
  b.   divergent boundaries  
  c.   reversals of Earth's magnetic field  
  d.   erosion  
  Hint    
      
  7.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    
      
  8.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 collide or slide along each other.  
  d.   They only can move toward each other.  
  Hint    
      
  9.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 always been located at 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 quickly moved apart to their current locations on Earth  
  Hint    
      
  10.How do scientists explain the formation of underwater mountain ranges?  
  a.   seafloor spreading  
  b.   continental drift  
  c.   strike-slip faults  
  d.   convection currents  
  Hint    
      
  11.What tool does a scientist use to detect magnetic fields?  
  a.   a thermometer  
  b.   a magnetogram  
  c.   a magnetometer  
  d.   a fieldometer  
  Hint    
      
  12.Who first proposed the theory of continental drift?  
  a.   Harry Hess  
  b.   Alfred Wegener  
  c.   Galileo Galilee  
  d.   Albert Einstein  
  Hint    
      
  13.Do two colliding continental plates always cause volcanoes?  
  a.   No, usually no subduction occurs when continental plates collide.  
  b.   Yes, subduction always occurs when continental plates collide.  
  c.   No, earthquakes always occur when two continental plates collide.  
  d.   Yes, subduction always occurs when oceanic plates collide.  
  Hint    
      
  14.How does the Mesosaurus fossil evidence support the continental drift theory?  
  a.   because it's unlikely that the Mesosaurus could swim between continents  
  b.   because the Mesosaurus lived millions of years ago, when scientists believe the continents began to drift  
  c.   because it's unlikely that the Mesosaurus existed on both continents.  
  d.   The Mesosaurus fossil evidence does not support the continental drift theory. It proves it wrong.  
  Hint    
      
  15.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 more shallow the water is.  
  b.   The longer it takes a sound wave to return to the ship, the colder the water is.  
  c.   The less time it takes a sound wave to return to the ship, the deeper the water is.  
  d.   The longer it takes a sound wave to return to the ship, the deeper the water is.  
  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 does plate tectonics cause?  
  a.   forms ocean basins  
  b.   all answers are correct  
  c.   causes volcanoes  
  d.   forms mountains  
  Hint    
      
  18.A divergent boundary is a boundary between two plates that __________.  
  a.   move toward each other  
  b.   converge  
  c.   slide along each other  
  d.   move away from each other  
  Hint    
      
  19.What is the plate tectonic theory?  
  a.   the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges  
  b.   the belief that Earth's crust and upper mantle is broken into sections  
  c.   the belief that continents have moved slowly apart to their current locations on Earth  
  d.   the belief that Earth is broken into sections that fit together into one sphere  
  Hint    
      
  20.What is a magnetic field reversal?  
  a.   when Earth's magnetic field leaves the north pole and enters the south pole  
  b.   when Earth's magnetic field leaves the south pole and enters the north pole  
  c.   when Earth's magnetic field suddenly disappears for short periods of time  
  d.   when Earth's magnetic field suddenly runs east/west instead of south/north  
  Hint    

 
   
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