Igneous Rocks

Practice Test
      
  1.According to the Table, which city is farthest north?

CityLatitude Longitude
Cape Town, South Africa34°S18°N
Pontianik, Indonesia109°E
Nome, Alaska65°N165°W
Quito Ecuador79°W
Stockholm, Sweden59°N18°E
Wellington, New Zealand41°S175°E


 
  a.   Pontianak, Indonesia  
  b.   Stockholm, Sweden  
  c.   Cape Town, South Africa  
  d.   Wellington, New Zealand  
      
  2.What part of an experiment is used to show that results are due to the condition being tested? SC.H.1.4.1  
  a.   control  
  b.   dependent variable  
  c.   hypothesis  
  d.   independent variable  
      
  3.What explains the behavior of natural phenomena? SC.H.1.4.3  
  a.   theories  
  b.   experiments  
  c.   dependent variables  
  d.   scientific laws  
      
  4.What is the distance of 1° longitude?  
  a.   it is always 111 km  
  b.   360 km  
  c.   60 km  
  d.   it changes from 111 km to a point  
      
  5.What do the nuclei of some isotopes release during radioactive decay?SC.A.2.4.2  
  a.   lead  
  b.   radiation  
  c.   valence electrons  
  d.   their nuclei  
      
  6.What is a hypothesis? SC.H.1.4.1  
  a.   A hypothesis is a suggested explanation of an observation.  
  b.   A hypothesis is the answer to a scientific question.  
  c.   A hypothesis is the same as identifying the problem in the scientific method.  
  d.   A hypothesis is the first step of the scientific method.  
      
  7.An Mg +2 particle has __________ electrons. SC.A.1.4.5  
  a.   lost two  
  b.   gained two  
  c.   lost four  
  d.   gained one  
      
  8.An igneous rock with two distinct grain sizes has a __________ texture. SC.D.1.4.2  
  a.   coarse-grained  
  b.   fine-grained  
  c.   felsic  
  d.   porphyritic  
      
  9.What is the molten material under Earth's crust called?  
  a.   magma  
  b.   minerals  
  c.   basalt  
  d.   solution  
      
  10.What is the smallest particle of an element?  
  a.   an atom  
  b.   an isotope  
  c.   a neutron  
  d.   a proton  
      
  11.An __________ is a solid in which the atoms are arranged in repeating patterns.  
  a.   crystal  
  b.   magma  
  c.   rock  
  d.   atom  
      
  12.The attraction of two atoms for a shared pair of electrons that hold the atoms together is called __________. SC.A.1.4.5  
  a.   a chemical reaction  
  b.   a compound  
  c.   a covalent bond  
  d.   an ionic bond  
      
  13.How does the satellite Topex/Poseidon map ocean features?  
  a.   visible light  
  b.   radar  
  c.   ultraviolet rays  
  d.   X rays  
      
  14.What branch of Bowen's reaction series cools with a continuous change in composition? SC.D.1.4.2  
  a.   the feldspars  
  b.   the silica chains  
  c.   the iron-magnesium groups  
  d.   the carbonates  
      
  15.If a mineral breaks along distinct planes, it is said to have __________.  
  a.   a high specific gravity  
  b.   cleavage  
  c.   fracture  
  d.   a dull luster  
      
  16.An __________ is an explanation that is based on the results of repeated experiments. SC.H.1.4.1  
  a.   hypothesis  
  b.   control  
  c.   law  
  d.   theory  
      
  17.Peridotite and dunite have __________ compositions. SC.D.1.4.2  
  a.   mafic  
  b.   intermediate  
  c.   ultramafic  
  d.   felsic  
      
  18.How does a Landsat satellite differentiate between objects on Earth's surface?  
  a.   Landsat measures the longest frequencies of electromagnetic radiation from Earth.  
  b.   Features on Earth radiate warmth at different frequencies, which show up as different colors on Landsat images.  
  c.   Landsat uses a single detector to measure the intensities of energy.  
  d.   Landsat satellites take pictures using visible light.  
      
  19.A mineral is __________ if it can be mined for profit.  
  a.   an igneous rock  
  b.   an ore  
  c.   a crystal  
  d.   a rock  

 
   
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