Section #: 17.3 Theory of Plate Tectonics

Practice Test
  1.The __________ states that Earth's crust and ridged upper mantle are broken into plates that move at different rates and in different directions.  
  a.   theory of seafloor spreading  
  b.   hypothesis of continental movement  
  c.   hypothesis of continental drift  
  d.   theory of plate tectonics  
  2.According to the figure, where is an earthquake's focus most likely to occur?

  a.   in the middle of the Pacific Ocean  
  b.   near the south pole  
  c.   along the west coast of North America  
  d.   in northern Eurasia  
  3.The map shows where the continents are likely to move in the next 50 million years. The shaded area represents their present position. According to the data on this map, what kind of boundary is found between the Americas and Africa?

  a.   convergent  
  b.   divergent  
  c.   transform  
  d.   subduction  
  4.When a divergent plate boundary forms on continents, a __________ forms.  
  a.   rift valley  
  b.   crater  
  c.   mid-continent ridge  
  d.   volcano  
  5.Identify the subduction zone in the figure.

  a.   A  
  b.   B  
  c.   C  
  d.   D  
  6.What is the process called when one plate is forced beneath another at a convergent plate boundary?  
  a.   transformation  
  b.   subtraction  
  c.   convergence  
  d.   subduction  
  7.Where do tectonic plates interact?  
  a.   in deep-sea trenches  
  b.   at mid-ocean ridges  
  c.   at plate centers  
  d.   at plate boundaries  
  8.Places where two tectonic plates are moving away from each other are called __________.  
  a.   transform boundaries  
  b.   divergent boundaries  
  c.   convergent boundaries  
  d.   earthquake boundaries  
  9.A place where two plates slide laterally past each other is called a __________.  
  a.   divergent boundary  
  b.   transform boundary  
  c.   mid-ocean ridge  
  d.   convergent boundary  

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