Practice Test
  1.How are the convection currents set in motion?  
  a.   slab push and ridge pull  
  b.   spreading mid-ocean ridges  
  c.   the heat from radioactive decay  
  d.   slab push  
  2.According to the seismogram shown in the figure, which wave is the fastest?

  a.   P-wave  
  b.   Surface wave  
  c.   Tidal wave  
  d.   S-wave  
  3.According to the graph, at what depth does the sea floor start to drop off?

  a.   4 km  
  b.   1 km  
  c.   2 km  
  d.   8 km  
  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.   location of foci  
  c.   strain buildup only  
  d.   magnitude of P-waves  
  5.How are submarine canyons formed?  
  a.   longshore current  
  b.   runoff  
  c.   rivers  
  d.   turbidity currents  
  6.What does the straight part of a stress-strain graph portray?  
  a.   failure  
  b.   elastic deformation  
  c.   shearing direction  
  d.   ductile deformation  
  7.Which type of stress pulls a material apart?  
  a.   tension  
  b.   compression  
  c.   shear  
  d.   strain  
  8.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.   Acapulco  
  b.   Chihuahua  
  c.   Boulder  
  d.   Houston  
  9.Unlike water, wind commonly can __________.  
  a.   abrade particles  
  b.   move sediment downhill  
  c.   put sediment into suspension  
  d.   move sediment uphill  
  10.What is the water content in the magma that fuels the volcano shown in the figure?

  a.   less water  
  b.   more water  
  c.   average water  
  d.   water completely absent  
  11.What type of instrument can measure the vibrations of an earthquake?  
  a.   seismograph  
  b.   seismometer  
  c.   sonar  
  d.   GPS  
  12.A place where two plates slide laterally past each other is called a __________.  
  a.   mid-ocean ridge  
  b.   transform boundary  
  c.   convergent boundary  
  d.   divergent boundary  
  13.What are shallow, intermediate, and deep earthquake classifications based on?  
  a.   frequency of the largest wave  
  b.   amplitude of the largest wave  
  c.   the depth of the focus  
  d.   the amount of damage  
  14.What are large, angular fragments thrown from a volcano called?  
  a.   volcanic bombs  
  b.   volcanic blocks  
  c.   lapilli  
  d.   ash  
  15.How does a Landsat satellite differentiate between objects on Earth's surface?  
  a.   Landsat measures the longest frequencies of electromagnetic radiation from Earth.  
  b.   Landsat uses a single detector to measure the intensities of energy.  
  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.  
  16.What is thought to be the driving mechanism of plate movement?  
  a.   convection currents in the mantle  
  b.   volcanoes  
  c.   conduction of heat in the mantle  
  d.   continental drifting  
  17.How does the satellite Topex/Poseidon map ocean features?  
  a.   radar  
  b.   ultraviolet rays  
  c.   X rays  
  d.   visible light  
  18.A large ocean wave that is generated by vertical motions of the seafloor during an earthquake is called a(n) __________.  
  a.   tsunami  
  b.   tidal range  
  c.   upwelling current  
  d.   seiche  
  19.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.   transform  
  c.   divergent  
  d.   convergent  
  20.How are dunes classified?  
  a.   side  
  b.   climate of location  
  c.   shape  
  d.   type of particles  

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