Section #: 19.1 Forces Within the Earth

Practice Test
  1.Which type of fault results in horizontal shortening?  
  a.   shear  
  b.   reverse  
  c.   strike-slip  
  d.   normal  
  2.__________ causes permanent strain.  
  a.   Tension  
  b.   Compression  
  c.   Ductile deformation  
  d.   Elastic deformation  
  3.__________ push and pull rocks in the same direction along which the waves are traveling.  
  a.   Surface waves  
  b.   Secondary waves  
  c.   Primary waves  
  d.   Shear waves  
  4.__________ is the force per unit area acting on a material.  
  a.   Stress  
  b.   Rotation  
  c.   Shear  
  d.   Strain  
  5.What are most earthquakes associated with?  
  a.   plate boundaries  
  b.   rift valleys  
  c.   mid-ocean ridges  
  d.   divergent plate boundaries  
  6.What does the straight part of a stress-strain graph portray?  
  a.   failure  
  b.   elastic deformation  
  c.   shearing direction  
  d.   ductile deformation  
  7.Where does an earthquake originate?  
  a.   at Earth's inner core  
  b.   at the P-wave  
  c.   at the focus  
  d.   at the epicenter  
  8.At what point in the graph would a rock be permanently deformed?

  a.   at the start of the stress  
  b.   at the elastic limit  
  c.   past the elastic limit  
  d.   at the failure point  
  9.Which type of stress pulls a material apart?  
  a.   strain  
  b.   tension  
  c.   shear  
  d.   compression  

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