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.   100 000 times  
  d.   100 times  
      
  2.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.   Chihuahua  
  b.   Boulder  
  c.   Acapulco  
  d.   Houston  
      
  3.Which type of stress pulls a material apart?  
  a.   strain  
  b.   tension  
  c.   shear  
  d.   compression  
      
  4.The __________ states that Earth's crust and ridged upper mantle are broken into plates that move at different rates and in different directions.  
  a.   hypothesis of continental drift  
  b.   theory of seafloor spreading  
  c.   hypothesis of continental movement  
  d.   theory of plate tectonics  
      
  5.What is the process called when one plate is forced beneath another at a convergent plate boundary?  
  a.   subtraction  
  b.   convergence  
  c.   subduction  
  d.   transformation  
      
  6.What does the straight part of a stress-strain graph portray?  
  a.   elastic deformation  
  b.   ductile deformation  
  c.   shearing direction  
  d.   failure  
      
  7.What type of volcano forms from alternating layers of tephra and nonexplosive lava?  
  a.   composite volcano  
  b.   caldera  
  c.   shield volcano  
  d.   cinder cone  
      
  8.How does a Landsat satellite differentiate between objects on Earth's surface?  
  a.   Landsat uses a single detector to measure the intensities of energy.  
  b.   Landsat measures the longest frequencies of electromagnetic radiation from Earth.  
  c.   Landsat satellites take pictures using visible light.  
  d.   Features on Earth radiate warmth at different frequencies, which show up as different colors on Landsat images.  
      
  9.Which of the sand dunes in the figure accumulates in areas with very little sand?



 
  a.   d  
  b.   b  
  c.   a  
  d.   c  
      
  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.   tsunami  
  c.   seiche  
  d.   upwelling current  
      
  11.How was the volcano cone shown in the figure formed?



 
  a.   a mixture of lava and volcanic fragments  
  b.   layer upon layer of basaltic lava accumulating during nonexplosive eruptions  
  c.   uplifting of mountains before exploding into a volcano  
  d.   material is ejected into the air and falls back to earth  
      
  12.According to the seismogram shown in the figure, which wave is the fastest?



 
  a.   P-wave  
  b.   Surface wave  
  c.   S-wave  
  d.   Tidal wave  
      
  13.How does the satellite Topex/Poseidon map ocean features?  
  a.   ultraviolet rays  
  b.   visible light  
  c.   radar  
  d.   X rays  
      
  14.What is thought to be the driving mechanism of plate movement?  
  a.   continental drifting  
  b.   convection currents in the mantle  
  c.   volcanoes  
  d.   conduction of heat in the mantle  
      
  15.What is the crustal part of the lithosphere primarily composed of?  
  a.   peridotite  
  b.   iron and nickel  
  c.   igneous rocks  
  d.   simple oxides  
      
  16.How are the convection currents set in motion?  
  a.   slab push  
  b.   the heat from radioactive decay  
  c.   spreading mid-ocean ridges  
  d.   slab push and ridge pull  
      
  17.The __________ side of a dune is called the __________ side and is located on the side from which the wind blows.  
  a.   steep-sloped, leeward  
  b.   gentle-sloped, leeward  
  c.   steep-sloped, windward  
  d.   gentle-sloped, windward  
      
  18.What is the probability of earthquake occurrence based on?  
  a.   reoccurrence rates of earthquakes in an area and the rate of strain buildup  
  b.   location of foci  
  c.   strain buildup only  
  d.   magnitude of P-waves  
      
  19.According to the graph, at what depth does the sea floor start to drop off?



 
  a.   2 km  
  b.   1 km  
  c.   4 km  
  d.   8 km  
      
  20.According to the graph, what is the approximate depth range of ocean basins?



 
  a.   2 km to 4 km  
  b.   8 km to 10 km  
  c.   1 km to 4 km  
  d.   6 km to 8 km  

 
   
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