Section #: 17.4 Causes of Plate Motions

Practice Test
  1.How are the convection currents set in motion?  
  a.   spreading mid-ocean ridges  
  b.   slab push and ridge pull  
  c.   slab push  
  d.   the heat from radioactive decay  
  2.What is thought to be the driving mechanism of plate movement?  
  a.   continental drifting  
  b.   volcanoes  
  c.   convection currents in the mantle  
  d.   conduction of heat in the mantle  

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