Earthquakes

Practice Test
      
  1.__________ push and pull rocks in the same direction along which the waves are traveling.  
  a.   Surface waves  
  b.   Primary waves  
  c.   Secondary waves  
  d.   Shear waves  
      
  2.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.   transform  
  b.   divergent  
  c.   convergent  
  d.   subduction  
      
  3.How many times larger is a magnitude 3 than a magnitude 1 earthquake on the Richter scale?  
  a.   100 times  
  b.   10 times  
  c.   1/10 times  
  d.   100 000 times  
      
  4.How are the convection currents set in motion?  
  a.   spreading mid-ocean ridges  
  b.   slab push and ridge pull  
  c.   the heat from radioactive decay  
  d.   slab push  
      
  5.Use the graph to determine how long it took for S-waves to reach Station B after the earthquake.  
  a.   20 minutes  
  b.   30 minutes  
  c.   10 minutes  
  d.   5 minutes  
      
  6.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  
      
  7.Unlike water, wind commonly can __________.  
  a.   move sediment uphill  
  b.   move sediment downhill  
  c.   put sediment into suspension  
  d.   abrade particles  
      
  8.At what point in the graph would a rock be permanently deformed?



 
  a.   at the start of the stress  
  b.   at the elastic limit  
  c.   past the elastic limit  
  d.   at the failure point  
      
  9.The process of collecting data far above Earth's surface is called __________.  
  a.   remote sensing  
  b.   mapmaking  
  c.   electromagnetic sensing  
  d.   topographic studies  
      
  10.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.   Features on Earth radiate warmth at different frequencies, which show up as different colors on Landsat images.  
  d.   Landsat satellites take pictures using visible light.  
      
  11.How are fjords formed?  
  a.   tectonic forces  
  b.   sea level rise  
  c.   longshore current  
  d.   global cooling  
      
  12.What are large, angular fragments thrown from a volcano called?  
  a.   volcanic bombs  
  b.   lapilli  
  c.   ash  
  d.   volcanic blocks  
      
  13.What is thought to be the driving mechanism of plate movement?  
  a.   volcanoes  
  b.   convection currents in the mantle  
  c.   continental drifting  
  d.   conduction of heat in the mantle  
      
  14.Which of the sand dunes in the figure accumulates in areas with very little sand?



 
  a.   d  
  b.   b  
  c.   c  
  d.   a  
      
  15.When a divergent plate boundary forms on continents, a __________ forms.  
  a.   crater  
  b.   volcano  
  c.   rift valley  
  d.   mid-continent ridge  
      
  16.What are shallow, intermediate, and deep earthquake classifications based on?  
  a.   amplitude of the largest wave  
  b.   the depth of the focus  
  c.   frequency of the largest wave  
  d.   the amount of damage  
      
  17.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.   60 N, 120 E  
  d.   0 N, 30 W  
      
  18.What is the crustal part of the lithosphere primarily composed of?  
  a.   simple oxides  
  b.   igneous rocks  
  c.   iron and nickel  
  d.   peridotite  
      
  19.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  
      
  20.A large ocean wave that is generated by vertical motions of the seafloor during an earthquake is called a(n) __________.  
  a.   seiche  
  b.   tidal range  
  c.   upwelling current  
  d.   tsunami  

 
   
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