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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  
  2.Where do most useful minerals occur in nature?  
  a.   in ores  
  b.   in seawater  
  c.   in freshwater  
  d.   in volcanoes  
  3.Common physical properties of minerals include all of the following except __________.  
  a.   hardness  
  b.   flammability  
  c.   appearance  
  d.   specific gravity  
  4.Streak measures the color of a mineral's __________.  
  a.   atoms  
  b.   crystals  
  c.   powder  
  d.   surface  
  5.All minerals are __________.  
  a.   organic solids  
  b.   unordered  
  c.   made in a lab  
  d.   naturally occurring  
  6.The hardest mineral, with a 10 on the Mohs scale, is __________.  
  a.   quartz  
  b.   iron  
  c.   diamond  
  d.   talc  
  7.Large crystals can form when magma __________.  
  a.   erupts from a volcano  
  b.   melts  
  c.   cools slowly  
  d.   cools quickly  
  8.Which is an example of a mineral with a nonmetallic luster?  
  a.   gold  
  b.   pyrite  
  c.   graphite  
  d.   quartz  
  9.Metallic elements dissolved in fluids form in __________.  
  a.   ores  
  b.   magma  
  c.   veins  
  d.   ponds  
  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  
  11.The specific gravity of a mineral compares its weight with an equal volume of __________.  
  a.   rock  
  b.   water  
  c.   diamond  
  d.   air  
  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  
  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  
  14.Glass is not a crystal because __________.  
  a.   it is not crystalline  
  b.   it is a solid  
  c.   it is transparent  
  d.   it fractures  
  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  
  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  
  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  
  18.Why are gems valuable?  
  a.   They are minerals.  
  b.   They are hard.  
  c.   They are crystals.  
  d.   They are rare.  
  19.Some gems have __________.  
  a.   fracture  
  b.   a low Mohs number  
  c.   no color  
  d.   a crystalline structure  
  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.  

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