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Minerals

Practice Test
      
  1.What is the easiest way to tell if a sample is gold or pyrite?  
  a.   hardness  
  b.   luster  
  c.   appearance  
  d.   streak  
  Hint    
      
  2.Amethyst is a variation of which mineral?  
  a.   quartz  
  b.   garnet  
  c.   diamond  
  d.   topaz  
  Hint    
      
  3.__________ is a solid in which the atoms are arranged in closely repeating patterns.  
  a.   A crystal  
  b.   An element  
  c.   A mineral  
  d.   An ore  
  Hint    
      
  4.Which is an industrial use of diamonds?  
  a.   in lasers  
  b.   in jewelry  
  c.   in watches  
  d.   as cutting tools  
  Hint    
      
  5.Titanium is useful because it has __________.  
  a.   a low Mohs number  
  b.   a high density and low durability  
  c.   a low density and high durability  
  d.   a colorless streak  
  Hint    
      
  6.Common physical properties of minerals include all of the following except __________.  
  a.   specific gravity  
  b.   flammability  
  c.   appearance  
  d.   hardness  
  Hint    
      
  7.Glass is not a crystal because __________.  
  a.   it is not crystalline  
  b.   it fractures  
  c.   it is transparent  
  d.   it is a solid  
  Hint    
      
  8.You find a red gemstone that is from Sri Lanka. What gem is this most likely?  
  a.   ruby spinel  
  b.   sapphire  
  c.   emerald  
  d.   topaz  
  Hint    
      
  9.Metallic elements dissolved in fluids form in __________.  
  a.   ores  
  b.   veins  
  c.   ponds  
  d.   magma  
  Hint    
      
  10.Which is an example of a mineral with a nonmetallic luster?  
  a.   pyrite  
  b.   gold  
  c.   graphite  
  d.   quartz  
  Hint    
      
  11.Streak measures the color of a mineral's __________.  
  a.   surface  
  b.   crystals  
  c.   powder  
  d.   atoms  
  Hint    
      
  12.The Hope diamond, which is now at the Smithsonian, is said to __________.  
  a.   bring its owner good fortune  
  b.   be one of the smallest diamonds in the world  
  c.   bring its owner bad luck  
  d.   be an impure diamond  
  Hint    
      
  13.The specific gravity of a mineral compares its weight with an equal volume of __________.  
  a.   air  
  b.   rock  
  c.   water  
  d.   diamond  
  Hint    
      
  14.All minerals are __________.  
  a.   unordered  
  b.   organic solids  
  c.   naturally occurring  
  d.   made in a lab  
  Hint    
      
  15.The hardest mineral, with a 10 on the Mohs scale, is __________.  
  a.   quartz  
  b.   diamond  
  c.   iron  
  d.   talc  
  Hint    
      
  16.Some gems have __________.  
  a.   a low Mohs number  
  b.   a crystalline structure  
  c.   no color  
  d.   fracture  
  Hint    
      
  17.An inorganic crystalline solid is formed in a lab. Why is it not a mineral?  
  a.   It is a solid.  
  b.   It is a crystal.  
  c.   It is inorganic.  
  d.   It is not naturally occurring.  
  Hint    
      
  18.A mineral that is hard __________.  
  a.   will not break  
  b.   can be scratched with your fingernail  
  c.   is hard to scratch  
  d.   will not shatter  
  Hint    
      
  19.Large crystals can form when magma __________.  
  a.   melts  
  b.   cools slowly  
  c.   cools quickly  
  d.   erupts from a volcano  
  Hint    
      
  20.Where do most useful minerals occur in nature?  
  a.   in seawater  
  b.   in freshwater  
  c.   in volcanoes  
  d.   in ores  
  Hint    

 
   
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