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Chapter 6: Thermal Energy

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

 
   
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