Earthquakes

Practice Test
      
  1.How many times larger is a magnitude 3 than a magnitude 1 earthquake on the Richter scale?  
  a.   1/10 times  
  b.   10 times  
  c.   100 times  
  d.   100 000 times  
      
  2.Which method uses sound waves for remote sensing?  
  a.   Topex/Poseison satellite  
  b.   GPS  
  c.   sonar  
  d.   Landsat satellite  
      
  3.Identify the subduction zone in the figure.



 
  a.   B  
  b.   C  
  c.   A  
  d.   D  
      
  4.What breaks mid-ocean ridges into smaller sections?  
  a.   abyssal plains  
  b.   shelf breaks  
  c.   submarine canyons  
  d.   fracture zones  
      
  5.Where does an earthquake originate?  
  a.   at Earth's inner core  
  b.   at the focus  
  c.   at the P-wave  
  d.   at the epicenter  
      
  6.What is the electromagnetic spectrum?  
  a.   the arrangement of electromagnetic radiation  
  b.   frequencies measured by satellites  
  c.   energy emitted from Earth  
  d.   visible light  
      
  7.What are large, angular fragments thrown from a volcano called?  
  a.   volcanic bombs  
  b.   ash  
  c.   volcanic blocks  
  d.   lapilli  
      
  8.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  
      
  9.Why are three circles needed to determine the epicenter, as shown in the figure?

 
  a.   The epicenter can move.  
  b.   The more measurements, the better.  
  c.   If only two circles are used, there are two possible locations.  
  d.   Scientists always take measurements in threes.  
      
  10.The record produced by a seismometer is called a __________.  
  a.   plot  
  b.   seismograph  
  c.   seismochart  
  d.   seismogram  
      
  11.According to the map, at which latitude and longitude is most likely to experience an earthquake?

Click here for figure

 
  a.   30 S, 60 W  
  b.   0 N, 30 W  
  c.   60 N, 120 E  
  d.   0 N, 180 W  
      
  12.According to the seismogram shown in the figure, which wave is the fastest?



 
  a.   P-wave  
  b.   S-wave  
  c.   Surface wave  
  d.   Tidal wave  
      
  13.According to the table, what happens to the water temperature as depth increases?

Ocean depth (m) 100 200 300 400 500 600 700 800 900 1000 1100 1200
Water temperature (C) 23 23 23 15 5.5 5 5 5 5 4.5 4.5 4


 
  a.   It remains constant.  
  b.   It increases.  
  c.   It fluctuates.  
  d.   It decreases.  
      
  14.What is a surface that has only large particles because the wind has removed the finer particles?  
  a.   a dune  
  b.   loess  
  c.   a desert pavement  
  d.   abraded  
      
  15.Which type of fault results in horizontal shortening?  
  a.   strike-slip  
  b.   reverse  
  c.   normal  
  d.   shear  
      
  16.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  
      
  17.Which of the sand dunes in the figure accumulates in areas with very little sand?



 
  a.   b  
  b.   a  
  c.   d  
  d.   c  
      
  18.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 drift  
  c.   hypothesis of continental movement  
  d.   theory of plate tectonics  
      
  19.What is the probability of earthquake occurrence based on?  
  a.   strain buildup only  
  b.   location of foci  
  c.   magnitude of P-waves  
  d.   reoccurrence rates of earthquakes in an area and the rate of strain buildup  
      
  20.What type of volcano forms from alternating layers of tephra and nonexplosive lava?  
  a.   cinder cone  
  b.   caldera  
  c.   shield volcano  
  d.   composite volcano  

 
   
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