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Minerals

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

 
   
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