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

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