Section #: 22.2 Formation of the Crust and Continents

Practice Test
      
  1.What is the name of the Precambrian shield in North America? SC.D.1.4.2  
  a.   the Northern Shield  
  b.   the Canadian Shield  
  c.   the Proterozoic Shield  
  d.   the Archean Shield  
  Hint    
      
  2.Minerals with low densities crystallize from a magma at __________ denser minerals do.SC.D.1.4.2  
  a.   always 10 degrees less than  
  b.   hotter temperatures than  
  c.   cooler temperatures than  
  d.   the same temperature as  
  Hint    
      
  3.Why is the age of a zircon grain older than the age of the sandstone that it was found in? SC.D.1.4.3  
  a.   It is much more stable than the sandstone.  
  b.   because of the principle of included fragments  
  c.   It is much less stable than the sandstone.  
  d.   because of the principle of superposition  
  Hint    
      
  4.According to the map, which areas of North America were most affected by the formation of the Canadian Shield? SC.D.1.4.3



 
  a.   the Southwest  
  b.   the Midwest  
  c.   the Pacific Coast  
  d.   Alaska  
  Hint    
      
  5.What continent existed around 1.8 billion years ago that now forms the core of modern North America? SC.D.1.4.3  
  a.   Rodinia  
  b.   Pangaea  
  c.   North America  
  d.   Laurentia  
  Hint    
      
  6.What is the name of the first supercontinent? SC.D.1.4.3  
  a.   Pangaea  
  b.   Rodinia  
  c.   Laurentia  
  d.   Baltica  
  Hint    
      
  7.What are areas called that contain cores of Archean and Proterozoic rock? SC.D.1.4.2  
  a.   Precambrian shields  
  b.   Canadian shields  
  c.   continental crust  
  d.   Archean shields  
  Hint    
      
  8.How are microcontinents fused together? SC.D.1.4.2  
  a.   the erosion of mountains  
  b.   by seams called faults  
  c.   by molten rock  
  d.   by seams called orogens  
  Hint    

 
   
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