Practice Test
  1.According to the map, a seismic station in which city would be the first to detect seismic waves from an earthquake occurring in Mexico City?

  a.   Houston  
  b.   Chihuahua  
  c.   Acapulco  
  d.   Boulder  
  2.When a divergent plate boundary forms on continents, a __________ forms.  
  a.   rift valley  
  b.   mid-continent ridge  
  c.   volcano  
  d.   crater  
  3.What is the process called when one plate is forced beneath another at a convergent plate boundary?  
  a.   subtraction  
  b.   subduction  
  c.   convergence  
  d.   transformation  
  4.The lowering of the land surface due to wind removing particles is called __________.  
  a.   deflation  
  b.   erosion  
  c.   abrasion  
  d.   saltation  
  5.__________ are submerged basaltic volcanoes more than 1 km high.  
  a.   Shelf breaks  
  b.   Submarine canyons  
  c.   Seamounts  
  d.   Fracture zones  
  6.How are the convection currents set in motion?  
  a.   the heat from radioactive decay  
  b.   spreading mid-ocean ridges  
  c.   slab push and ridge pull  
  d.   slab push  
  7.What is thought to be the driving mechanism of plate movement?  
  a.   continental drifting  
  b.   volcanoes  
  c.   conduction of heat in the mantle  
  d.   convection currents in the mantle  
  8.How many satellites are in the GPS?  
  a.   50  
  b.   6  
  c.   24  
  d.   4  
  9.What is a rating from the Richter scale based on?  
  a.   damage from the largest wave  
  b.   frequency of the waves  
  c.   size of the largest wave  
  d.   wavelength of the waves  
  10.A large ocean wave that is generated by vertical motions of the seafloor during an earthquake is called a(n) __________.  
  a.   tidal range  
  b.   upwelling current  
  c.   seiche  
  d.   tsunami  
  11.Which method uses sound waves for remote sensing?  
  a.   sonar  
  b.   Landsat satellite  
  c.   Topex/Poseison satellite  
  d.   GPS  
  12.Where does an earthquake originate?  
  a.   at Earth's inner core  
  b.   at the P-wave  
  c.   at the focus  
  d.   at the epicenter  
  13.When is wind-transported material deposited?  
  a.   when the wind slows  
  b.   when the particles break apart  
  c.   when the wind becomes stronger  
  d.   when the wind changes direction  
  14.How is a volcanic crater connected to a magma chamber?  
  a.   by a hot spot  
  b.   by a vent  
  c.   by tephra  
  d.   by a sill  
  15.Which waves are called body waves?  
  a.   P-waves and surface waves  
  b.   surface waves and S-waves  
  c.   P-waves and S-waves  
  d.   surface waves only  
  16.What is a pyroclastic flow?  
  a.   poisonous gas of a volcano  
  b.   lava that hardens into a batholith  
  c.   when lava comes out of a volcanic vent  
  d.   a mixture of volcanic gas, ash, and other tephra  
  17.According to the seismogram shown in the figure, which wave is the fastest?

  a.   Tidal wave  
  b.   P-wave  
  c.   Surface wave  
  d.   S-wave  
  18.At what point in the graph would a rock be permanently deformed?

  a.   at the elastic limit  
  b.   at the start of the stress  
  c.   at the failure point  
  d.   past the elastic limit  
  19.What is the probability of earthquake occurrence based on?  
  a.   strain buildup only  
  b.   reoccurrence rates of earthquakes in an area and the rate of strain buildup  
  c.   magnitude of P-waves  
  d.   location of foci  
  20.How deep is the deepest place in the ocean?  
  a.   11 km  
  b.   20 km  
  c.   2 km  
  d.   100 km  

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