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Energy

Practice Test
      
  1.Energy stored in chemical bonds is __________.  
  a.   chemical kinetic energy  
  b.   thermal potential energy  
  c.   energy of activation  
  d.   chemical potential energy  
  Hint    
      
  2.During energy transformations, energy is never __________.  
  a.   released as heat  
  b.   created or destroyed  
  c.   used to increase an object's potential energy  
  d.   completely transformed  
  Hint    
      
  3.Which of the following vehicles has the most kinetic energy?  
  a.   a 900-kg car traveling 80 km/h  
  b.   a 2000-kg truck traveling 50 km/h  
  c.   a 300-kg motorcycle traveling 100 km/h  
  d.   a 1,100-kg car traveling 60 km/h  
  Hint    
      
  4.Carbohydrates and proteins each supply about __________ Calories of energy per gram.  
  a.   40  
  b.   14  
  c.   4  
  d.   400  
  Hint    
      
  5.The __________ is the SI unit of energy.  
  a.   volt  
  b.   ampere  
  c.   watt  
  d.   joule  
  Hint    
      
  6.Which of the following is NOT a form of energy?  
  a.   friction  
  b.   electrical  
  c.   chemical  
  d.   thermal  
  Hint    
      
  7.Which of the following objects has potential energy?  
  a.   a bowling ball knocking over a pin  
  b.   a bicycle coasting down a hill  
  c.   a glass sitting on a table  
  d.   a ball rolling across the floor  
  Hint    
      
  8.What two factors determine how much potential energy an object has?  
  a.   mass and position  
  b.   speed and position  
  c.   speed and surface area  
  d.   speed and mass  
  Hint    
      
  9.How much gravitational potential energy does a 75-kg diver have stepping off the edge of a 5-m platform?  
  a.   147 J  
  b.   15 J  
  c.   3,675 J  
  d.   375 J  
  Hint    
      
  10.What two factors determine how much gravitational potential energy is in an object?  
  a.   shape of the object and its position relative to the ground  
  b.   shape and speed of the object  
  c.   weight and speed of the object  
  d.   weight of the object and height above the ground  
  Hint    
      
  11.__________ is the ability to cause change.  
  a.   Energy  
  b.   Momentum  
  c.   Power  
  d.   Work  
  Hint    
      
  12.__________ is energy stored by things that stretch or compress.  
  a.   Elastic kinetic energy  
  b.   Gravitational potential  
  c.   Elastic potential energy  
  d.   Chemical kinetic energy  
  Hint    
      
  13.Which of the following objects has kinetic energy?  
  a.   a bicycle parked at the top of a hill  
  b.   a sunny windowsill  
  c.   leaves lying on the ground beneath a tree  
  d.   a ball rolling across the floor  
  Hint    
      
  14.Which of the following statements about an apple falling from a tree is true?  
  a.   Its potential energy decreases and its kinetic energy increases.  
  b.   Its mechanical energy increases.  
  c.   Its kinetic energy decreases and its potential energy increases.  
  d.   Its kinetic and potential energies remain constant.  
  Hint    
      
  15.The law of conservation of energy states that __________.  
  a.   energy is not created or destroyed and its form is constant  
  b.   energy can be created and destroyed but cannot change form  
  c.   when energy is transformed, the total energy of a system is less than it was before the change  
  d.   energy cannot be created or destroyed  
  Hint    
      
  16.A baseball is hit into the air with a bat. When does the baseball have the greatest gravitational potential energy?  
  a.   when it hits the ground  
  b.   when it reaches its highest point  
  c.   when it leaves the bat  
  d.   when the mechanical and kinetic energies of the baseball are equal  
  Hint    
      
  17.As energy transformations occur within a system, the total energy of the system __________.  
  a.   remains constant  
  b.   increases  
  c.   decreases  
  d.   is transferred out of the system  
  Hint    
      
  18.__________ is the energy stored in an object due to its position.  
  a.   Potential energy  
  b.   Thermal energy  
  c.   Entropy  
  d.   Kinetic energy  
  Hint    
      
  19.The total amount of potential and kinetic energy in a system is called __________.  
  a.   energy maximum  
  b.   mechanical energy  
  c.   complete energy  
  d.   thermal energy  
  Hint    
      
  20.One food Calorie is equivalent to approximately __________.  
  a.   40 J  
  b.   4 J  
  c.   4,000 J  
  d.   400 J  
  Hint    

 
   
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