Earthquakes

Practice Test
      
  1.What is the water content in the magma that fuels the volcano shown in the figure?



 
  a.   water completely absent  
  b.   less water  
  c.   average water  
  d.   more water  
      
  2.How many times larger is a magnitude 3 than a magnitude 1 earthquake on the Richter scale?  
  a.   100 000 times  
  b.   100 times  
  c.   10 times  
  d.   1/10 times  
      
  3.How are the convection currents set in motion?  
  a.   the heat from radioactive decay  
  b.   slab push and ridge pull  
  c.   slab push  
  d.   spreading mid-ocean ridges  
      
  4.What are shallow, intermediate, and deep earthquake classifications based on?  
  a.   the amount of damage  
  b.   the depth of the focus  
  c.   amplitude of the largest wave  
  d.   frequency of the largest wave  
      
  5.When is wind-transported material deposited?  
  a.   when the particles break apart  
  b.   when the wind becomes stronger  
  c.   when the wind changes direction  
  d.   when the wind slows  
      
  6.Which method uses sound waves for remote sensing?  
  a.   Landsat satellite  
  b.   sonar  
  c.   Topex/Poseison satellite  
  d.   GPS  
      
  7.Use the graph to determine how long it took for S-waves to reach Station B after the earthquake.  
  a.   30 minutes  
  b.   10 minutes  
  c.   5 minutes  
  d.   20 minutes  
      
  8.According to the map, at which latitude and longitude is most likely to experience an earthquake?

Click here for figure

 
  a.   0 N, 30 W  
  b.   30 S, 60 W  
  c.   60 N, 120 E  
  d.   0 N, 180 W  
      
  9.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  
      
  10.How deep is the deepest place in the ocean?  
  a.   2 km  
  b.   100 km  
  c.   20 km  
  d.   11 km  
      
  11.What are most earthquakes associated with?  
  a.   mid-ocean ridges  
  b.   divergent plate boundaries  
  c.   plate boundaries  
  d.   rift valleys  
      
  12.__________ are submerged basaltic volcanoes more than 1 km high.  
  a.   Shelf breaks  
  b.   Fracture zones  
  c.   Submarine canyons  
  d.   Seamounts  
      
  13.How was the volcano cone shown in the figure formed?



 
  a.   material is ejected into the air and falls back to earth  
  b.   uplifting of mountains before exploding into a volcano  
  c.   layer upon layer of basaltic lava accumulating during nonexplosive eruptions  
  d.   a mixture of lava and volcanic fragments  
      
  14.Where do tectonic plates interact?  
  a.   in deep-sea trenches  
  b.   at mid-ocean ridges  
  c.   at plate boundaries  
  d.   at plate centers  
      
  15.The __________ side of a dune is called the __________ side and is located on the side from which the wind blows.  
  a.   steep-sloped, windward  
  b.   gentle-sloped, leeward  
  c.   gentle-sloped, windward  
  d.   steep-sloped, leeward  
      
  16.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.   location of foci  
  d.   strain buildup only  
      
  17.Which type of stress pulls a material apart?  
  a.   shear  
  b.   tension  
  c.   strain  
  d.   compression  
      
  18.What is Earth's core composed of?  
  a.   magnesium and silicon  
  b.   iron and nickel  
  c.   nickel and silicon  
  d.   hydrogen and iron  
      
  19.When a divergent plate boundary forms on continents, a __________ forms.  
  a.   crater  
  b.   rift valley  
  c.   volcano  
  d.   mid-continent ridge  
      
  20.How many satellites are in the GPS?  
  a.   6  
  b.   24  
  c.   50  
  d.   4  

 
   
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