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Chapter 11: The Rock Cycle

Practice Test
  1.Which type of rock forms as a result of volcanic activity?  
  a.   intrusive  
  b.   evaporite  
  c.   detrital  
  d.   extrusive  
  2.The white cliffs of Dover are composed of which rock type?  
  a.   foliated metamorphic  
  b.   organic sedimentary  
  c.   detrital sedimentary  
  d.   extrusive igneous  
  3.Select the BEST definition of a rock.  
  a.   a mixture of one or more minerals, mineraloids, glass, or organic materials  
  b.   a mixture of quartz, mica, hornblende, and feldspar  
  c.   a mixture of halite and calcite  
  d.   a mixture of organic remains and synthetic materials  
  4.What is the first step in the formation of a detrital sedimentary rock?  
  a.   cementation of mineral grains and rock fragments  
  b.   compaction of mineral grains and rock fragments  
  c.   weathering and erosion of mineral  
  d.   melting of mineral grains and rock fragments  
  5.Select the most common extrusive igneous rock.  
  a.   obsidian  
  b.   basalt  
  c.   chert  
  d.   granite  
  6.How can heat and pressure change the appearance of mineral grains during the formation of a metamorphic rock?  
  a.   They may weather to clay.  
  b.   They may melt to form glass.  
  c.   They may flatten and line up.  
  d.   They may dissolve and form a geode.  
  7.What information about the geologic history of an area can be gained from fossils?  
  a.   the relative ages of rocks  
  b.   how once-living organisms have changed over time  
  c.   the features of once-living organisms  
  d.   all of the above  
  8.A stream flows through a mountainous area and plucks off grains of granite along the way. The chunks of granite are carried by the stream until the flowing water can hold them no longer and they drop to the bottom of a deep pool. Which part of the rock cycle does this activity represent?  
  a.   weathering and erosion of igneous rock to form new sediments  
  b.   weathering and erosion of metamorphic rock to form new metamorphic rocks  
  c.   compaction and cementation to form new sediments  
  d.   compaction and pressure to form new metamorphic rocks  
  9.Which is true of intrusive rocks?  
  a.   They form as lava cools and solidifies above Earth's surface.  
  b.   They form as magma cools and solidifies below Earth's surface.  
  c.   They form as water dissolves minerals below Earth's surface.  
  d.   They form as water wears away minerals on Earth's surface.  
  10.How is concrete different from conglomerate?  
  a.   Concrete is human-made and conglomerate forms in nature.  
  b.   Concrete is a solid and conglomerate is a sediment.  
  c.   Concrete is grainy and conglomerate is smooth.  
  d.   Concrete is igneous and conglomerate is sedimentary.  
  11.How are metamorphic rocks classified by texture?  
  a.   as intrusive or extrusive  
  b.   as foliated or nonfoliated  
  c.   as heated or pressurized  
  d.   as detrital or organic  
  12.How are igneous rocks classified?  
  a.   by hardness and abundance  
  b.   by grain size and overall color  
  c.   by luster and hardness  
  d.   by grain roundness and hardness  
  13.Granite is a mixture of interlocked minerals formed from cooling magma. Which of the following minerals is NOT a major component of granite?  
  a.   mica  
  b.   quartz  
  c.   halite  
  d.   feldspar  
  14.What physical property of obsidian makes it useful as a tool?  
  a.   the way it fractures  
  b.   its rapid cooling rate  
  c.   its glassy luster  
  d.   its streak  
  15.How do igneous rocks form?  
  a.   as molten material cools and solidifies  
  b.   as water evaporates from a salty solution  
  c.   as crystalline material melts  
  d.   as sand grains are compressed at Earth's surface  

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