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Practice Test
  1.Where do most useful minerals occur in nature?  
  a.   in volcanoes  
  b.   in ores  
  c.   in seawater  
  d.   in freshwater  
  2.The specific gravity of a mineral compares its weight with an equal volume of __________.  
  a.   air  
  b.   rock  
  c.   water  
  d.   diamond  
  3.All of the following are some other property used to identify minerals except __________.  
  a.   reaction to hydrochloric acid  
  b.   the ability for the mineral to create a double image  
  c.   boiling point  
  d.   magnetism  
  4.__________ is a solid in which the atoms are arranged in closely repeating patterns.  
  a.   An ore  
  b.   An element  
  c.   A crystal  
  d.   A mineral  
  5.Why are gems valuable?  
  a.   They are crystals.  
  b.   They are hard.  
  c.   They are rare.  
  d.   They are minerals.  
  6.Which is an industrial use of diamonds?  
  a.   in jewelry  
  b.   as cutting tools  
  c.   in lasers  
  d.   in watches  
  7.Common physical properties of minerals include all of the following except __________.  
  a.   specific gravity  
  b.   appearance  
  c.   flammability  
  d.   hardness  
  8.The hardest mineral, with a 10 on the Mohs scale, is __________.  
  a.   quartz  
  b.   iron  
  c.   talc  
  d.   diamond  
  9.A mineral that is hard __________.  
  a.   will not break  
  b.   will not shatter  
  c.   can be scratched with your fingernail  
  d.   is hard to scratch  
  10.Glass is not a crystal because __________.  
  a.   it is not crystalline  
  b.   it fractures  
  c.   it is a solid  
  d.   it is transparent  
  11.Which is an example of a mineral with a nonmetallic luster?  
  a.   graphite  
  b.   quartz  
  c.   gold  
  d.   pyrite  
  12.Large crystals can form when magma __________.  
  a.   erupts from a volcano  
  b.   cools slowly  
  c.   melts  
  d.   cools quickly  
  13.Amethyst is a variation of which mineral?  
  a.   quartz  
  b.   garnet  
  c.   diamond  
  d.   topaz  
  14.Whether a mineral has cleavage or fracture is determined by the __________.  
  a.   shape of its surface  
  b.   specific gravity  
  c.   arrangement of its atoms  
  d.   hardness of the mineral  
  15.Titanium is useful because it has __________.  
  a.   a colorless streak  
  b.   a low density and high durability  
  c.   a high density and low durability  
  d.   a low Mohs number  
  16.All minerals are __________.  
  a.   organic solids  
  b.   naturally occurring  
  c.   made in a lab  
  d.   unordered  
  17.An inorganic crystalline solid is formed in a lab. Why is it not a mineral?  
  a.   It is inorganic.  
  b.   It is not naturally occurring.  
  c.   It is a solid.  
  d.   It is a crystal.  
  18.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  
  19.Streak measures the color of a mineral's __________.  
  a.   crystals  
  b.   atoms  
  c.   powder  
  d.   surface  
  20.The Hope diamond, which is now at the Smithsonian, is said to __________.  
  a.   bring its owner bad luck  
  b.   be an impure diamond  
  c.   bring its owner good fortune  
  d.   be one of the smallest diamonds in the world  

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