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Chapter 6: Thermal Energy

Practice Test
      
  1.Why are gasoline engines so inefficient?  
  a.   because cars are heavy and therefore difficult to move  
  b.   because the world is quickly running out of oil, which is used to manufacture gasoline  
  c.   because most of the heat produced just makes the car warmer and does not work  
  d.   because exhaust from gasoline engines damages the environment  
  Hint    
      
  2.What temperature is the boiling point of water on the Celsius scale.  
  a.   212°C  
  b.   32°C  
  c.   100°C  
  d.   0°C  
  Hint    
      
  3.What is the term for heat transfer by motion of a heat-carrying medium?  
  a.   temperature  
  b.   radiation  
  c.   convection  
  d.   conduction  
  Hint    
      
  4.How does a vacuum bottle minimize heat transfer?  
  a.   An inner vacuum in the bottle prevents convection and conduction.  
  b.   Reflective coating inside the bottle minimizes radiation.  
  c.   Inner glass bottles minimize conduction.  
  d.   All of the above.  
  Hint    
      
  5.What is the term for heat moving through a material or from one material to another?  
  a.   convention  
  b.   radiation  
  c.   temperature  
  d.   conduction  
  Hint    
      
  6.What is a potential environmental problems related to thermal pollution?  
  a.   Increased temperature of water may make it difficult for fish to breathe.  
  b.   eutrophication of a body of water  
  c.   introduction of new species  
  d.   All of the above.  
  Hint    
      
  7.What means of heat transfer does not require a medium?  
  a.   radiation  
  b.   convection  
  c.   All means of heat transfer require a medium.  
  d.   conduction  
  Hint    
      
  8.What is latent heat?  
  a.   the amount of energy required to change the physical state of a material  
  b.   the heat used to raise the temperature of steam  
  c.   heat that is not measurable  
  d.   All of the above.  
  Hint    
      
  9.What can be said of two objects that are in thermal equilibrium?  
  a.   The objects have the same amount of potential energy.  
  b.   Heat energy is in transit between the objects.  
  c.   The two objects have the same temperature.  
  d.   All of the above.  
  Hint    
      
  10.Who is credited with the invention of the modern liquid-in-glass thermometer?  
  a.   Fahrenheit  
  b.   Galileo  
  c.   Celsius  
  d.   Kelvin  
  Hint    
      
  11.What material property is important in refrigeration?  
  a.   Liquids can gain thermal energy from their surroundings.  
  b.   Liquids evaporate more as they become warmer.  
  c.   When a gas is compressed, it gains thermal energy.  
  d.   All of the above.  
  Hint    
      
  12.How is thermal energy transferred from one object to another?  
  a.   Heat moves from a warm object to a cold object.  
  b.   Transfer of thermal energy continues until objects are in thermal equilibrium.  
  c.   When a gas is compressed, it gains thermal energy.  
  d.   All of the above.  
  Hint    
      
  13.What means of heat transfer is thought to be the driving mechanism of plate tectonics?  
  a.   volcanoes  
  b.   convection  
  c.   conduction  
  d.   radiation  
  Hint    
      
  14.How does heat produce work in an automobile engine?  
  a.   Friction in the engine produces heat.  
  b.   Heat produced by the engine is used to pump compressed air.  
  c.   conduction  
  d.   All of the above.  
  Hint    
      
  15.What is heat?  
  a.   the amount of energy required to change the physical state of a material  
  b.   the energy transferred from something of higher temperature to lower temperature  
  c.   a measure of how much thermal energy is in an object  
  d.   All of the above.  
  Hint    

 
   
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