Practice Test
  1.Places where two tectonic plates are moving away from each other are called __________.  
  a.   convergent boundaries  
  b.   divergent boundaries  
  c.   transform boundaries  
  d.   earthquake boundaries  
  2.What is the water content in the magma that fuels the volcano shown in the figure?

  a.   more water  
  b.   less water  
  c.   water completely absent  
  d.   average water  
  3.What is the shallowest part of the continental margin called?  
  a.   the shelf break  
  b.   the continental rise  
  c.   a submarine canyon  
  d.   the continental shelf  
  4.What is the probability of earthquake occurrence based on?  
  a.   reoccurrence rates of earthquakes in an area and the rate of strain buildup  
  b.   magnitude of P-waves  
  c.   strain buildup only  
  d.   location of foci  
  5.The __________ side of a dune is called the __________ side and is located on the side from which the wind blows.  
  a.   gentle-sloped, windward  
  b.   steep-sloped, windward  
  c.   steep-sloped, leeward  
  d.   gentle-sloped, leeward  
  6.How does the satellite Topex/Poseidon map ocean features?  
  a.   ultraviolet rays  
  b.   X rays  
  c.   visible light  
  d.   radar  
  7.Which type of fault results in horizontal shortening?  
  a.   strike-slip  
  b.   reverse  
  c.   shear  
  d.   normal  
  8.Which of the sand dunes in the figure accumulates in areas with very little sand?

  a.   a  
  b.   b  
  c.   c  
  d.   d  
  9.What are most earthquakes associated with?  
  a.   mid-ocean ridges  
  b.   rift valleys  
  c.   plate boundaries  
  d.   divergent plate boundaries  
  10.What is the crustal part of the lithosphere primarily composed of?  
  a.   igneous rocks  
  b.   peridotite  
  c.   simple oxides  
  d.   iron and nickel  
  11.How are the convection currents set in motion?  
  a.   slab push and ridge pull  
  b.   the heat from radioactive decay  
  c.   slab push  
  d.   spreading mid-ocean ridges  
  12.How are fjords formed?  
  a.   sea level rise  
  b.   longshore current  
  c.   global cooling  
  d.   tectonic forces  
  13.What is thought to be the driving mechanism of plate movement?  
  a.   conduction of heat in the mantle  
  b.   convection currents in the mantle  
  c.   volcanoes  
  d.   continental drifting  
  14.Which wave arrives at a seismic facility first?  
  a.   P-wave  
  b.   tidal wave  
  c.   surface wave  
  d.   S-wave  
  15.What is a rating from the Richter scale based on?  
  a.   size of the largest wave  
  b.   wavelength of the waves  
  c.   damage from the largest wave  
  d.   frequency of the waves  
  16.Volcanoes that form far from plate boundaries form as the result of __________.  
  a.   hot spots  
  b.   cinder cones  
  c.   volcanic bombs  
  d.   divergent plate boundaries  
  17.The map shows where the continents are likely to move in the next 50 million years. The shaded area represents their present position. According to the data on this map, what kind of boundary is found between the Americas and Africa?

  a.   subduction  
  b.   divergent  
  c.   convergent  
  d.   transform  
  18.Why are three circles needed to determine the epicenter, as shown in the figure?

  a.   The more measurements, the better.  
  b.   Scientists always take measurements in threes.  
  c.   If only two circles are used, there are two possible locations.  
  d.   The epicenter can move.  
  19.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.   tsunami  
  d.   seiche  
  20.Which method uses sound waves for remote sensing?  
  a.   Topex/Poseison satellite  
  b.   Landsat satellite  
  c.   GPS  
  d.   sonar  

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