Earthquakes

Practice Test
      
  1.What is a rock called that has been shaped by wind-blown sediments?  
  a.   a ventifact  
  b.   a dune  
  c.   a desert pavement  
  d.   loess  
      
  2.What is a rating from the Richter scale based on?  
  a.   frequency of the waves  
  b.   size of the largest wave  
  c.   wavelength of the waves  
  d.   damage from the largest wave  
      
  3.How are submarine canyons formed?  
  a.   longshore current  
  b.   runoff  
  c.   rivers  
  d.   turbidity currents  
      
  4.The process of collecting data far above Earth's surface is called __________.  
  a.   mapmaking  
  b.   topographic studies  
  c.   electromagnetic sensing  
  d.   remote sensing  
      
  5.Identify the subduction zone in the figure.



 
  a.   D  
  b.   C  
  c.   B  
  d.   A  
      
  6.What does the straight part of a stress-strain graph portray?  
  a.   elastic deformation  
  b.   failure  
  c.   shearing direction  
  d.   ductile deformation  
      
  7.How are the convection currents set in motion?  
  a.   the heat from radioactive decay  
  b.   slab push and ridge pull  
  c.   spreading mid-ocean ridges  
  d.   slab push  
      
  8.Which wave arrives at a seismic facility first?  
  a.   surface wave  
  b.   P-wave  
  c.   tidal wave  
  d.   S-wave  
      
  9.Why are three circles needed to determine the epicenter, as shown in the figure?

 
  a.   The more measurements, the better.  
  b.   If only two circles are used, there are two possible locations.  
  c.   Scientists always take measurements in threes.  
  d.   The epicenter can move.  
      
  10.When a divergent plate boundary forms on continents, a __________ forms.  
  a.   crater  
  b.   rift valley  
  c.   volcano  
  d.   mid-continent ridge  
      
  11.Unlike water, wind commonly can __________.  
  a.   move sediment uphill  
  b.   abrade particles  
  c.   put sediment into suspension  
  d.   move sediment downhill  
      
  12.Rock fragments thrown into the air during a volcanic eruption are called __________.  
  a.   lava  
  b.   extrusive  
  c.   tephra  
  d.   granite  
      
  13.What is thought to be the driving mechanism of plate movement?  
  a.   convection currents in the mantle  
  b.   continental drifting  
  c.   conduction of heat in the mantle  
  d.   volcanoes  
      
  14.__________ are submerged basaltic volcanoes more than 1 km high.  
  a.   Shelf breaks  
  b.   Seamounts  
  c.   Fracture zones  
  d.   Submarine canyons  
      
  15.At what point in the graph would a rock be permanently deformed?



 
  a.   at the start of the stress  
  b.   at the failure point  
  c.   at the elastic limit  
  d.   past the elastic limit  
      
  16.A large ocean wave that is generated by vertical motions of the seafloor during an earthquake is called a(n) __________.  
  a.   tsunami  
  b.   seiche  
  c.   upwelling current  
  d.   tidal range  
      
  17.How was the volcano cone shown in the figure formed?



 
  a.   layer upon layer of basaltic lava accumulating during nonexplosive eruptions  
  b.   a mixture of lava and volcanic fragments  
  c.   uplifting of mountains before exploding into a volcano  
  d.   material is ejected into the air and falls back to earth  
      
  18.According to the map, at which latitude and longitude is most likely to experience an earthquake?

Click here for figure

 
  a.   0 N, 180 W  
  b.   30 S, 60 W  
  c.   0 N, 30 W  
  d.   60 N, 120 E  
      
  19.What is the electromagnetic spectrum?  
  a.   energy emitted from Earth  
  b.   visible light  
  c.   the arrangement of electromagnetic radiation  
  d.   frequencies measured by satellites  
      
  20.According to the seismogram shown in the figure, which wave is the fastest?



 
  a.   Tidal wave  
  b.   S-wave  
  c.   Surface wave  
  d.   P-wave  

 
   
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