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Chapter 11: The Rock Cycle

Practice Test
  1.Which type of rock forms as a result of volcanic activity?  
  a.   detrital  
  b.   extrusive  
  c.   evaporite  
  d.   intrusive  
  2.Which is true of intrusive rocks?  
  a.   They form as water dissolves minerals below Earth's surface.  
  b.   They form as lava cools and solidifies above Earth's surface.  
  c.   They form as water wears away minerals on Earth's surface.  
  d.   They form as magma cools and solidifies below Earth's surface.  
  3.What information about the geologic history of an area can be gained from fossils?  
  a.   how once-living organisms have changed over time  
  b.   the features of once-living organisms  
  c.   They form as water wears away minerals on Earth's surface.  
  d.   all of the above  
  4.How are metamorphic rocks classified by texture?  
  a.   as detrital or organic  
  b.   as heated or pressurized  
  c.   as intrusive or extrusive  
  d.   as foliated or nonfoliated  
  5.How do igneous rocks form?  
  a.   as water evaporates from a salty solution  
  b.   as sand grains are compressed at Earth's surface  
  c.   as crystalline material melts  
  d.   as molten material cools and solidifies  
  6.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.   compaction and cementation to form new sediments  
  b.   compaction and pressure to form new metamorphic rocks  
  c.   weathering and erosion of metamorphic rock to form new metamorphic rocks  
  d.   weathering and erosion of igneous rock to form new sediments  
  7.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.   melting of mineral grains and rock fragments  
  d.   weathering and erosion of mineral  
  8.How is concrete different from conglomerate?  
  a.   Concrete is human-made and conglomerate forms in nature.  
  b.   Concrete is grainy and conglomerate is smooth.  
  c.   Concrete is igneous and conglomerate is sedimentary.  
  d.   Concrete is a solid and conglomerate is a sediment.  
  9.Select the most common extrusive igneous rock.  
  a.   obsidian  
  b.   granite  
  c.   basalt  
  d.   chert  
  10.Granite is a mixture of interlocked minerals formed from cooling magma. Which of the following minerals is NOT a major component of granite?  
  a.   feldspar  
  b.   mica  
  c.   halite  
  d.   quartz  
  11.The white cliffs of Dover are composed of which rock type?  
  a.   foliated metamorphic  
  b.   detrital sedimentary  
  c.   extrusive igneous  
  d.   organic sedimentary  
  12.How are igneous rocks classified?  
  a.   by grain roundness and hardness  
  b.   by luster and hardness  
  c.   by hardness and abundance  
  d.   by grain size and overall color  
  13.Select the BEST definition of a rock.  
  a.   a mixture of halite and calcite  
  b.   a mixture of organic remains and synthetic materials  
  c.   a mixture of quartz, mica, hornblende, and feldspar  
  d.   a mixture of one or more minerals, mineraloids, glass, or organic materials  
  14.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 dissolve and form a geode.  
  c.   They may flatten and line up.  
  d.   They may melt to form glass.  
  15.What physical property of obsidian makes it useful as a tool?  
  a.   its streak  
  b.   its rapid cooling rate  
  c.   the way it fractures  
  d.   its glassy luster  

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