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Minerals

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

 
   
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