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Energy

Practice Test
      
  1.__________ is the energy stored in an object due to its position.  
  a.   Thermal energy  
  b.   Entropy  
  c.   Kinetic energy  
  d.   Potential energy  
  Hint    
      
  2.As energy transformations occur within a system, the total energy of the system __________.  
  a.   is transferred out of the system  
  b.   increases  
  c.   decreases  
  d.   remains constant  
  Hint    
      
  3.__________ is energy stored by things that stretch or compress.  
  a.   Chemical kinetic energy  
  b.   Gravitational potential  
  c.   Elastic kinetic energy  
  d.   Elastic potential energy  
  Hint    
      
  4.Without changing the mass of a moving object, doubling its velocity will __________ its kinetic energy.  
  a.   double  
  b.   quadruple  
  c.   triple  
  d.   not affect  
  Hint    
      
  5.How much gravitational potential energy does a 75-kg diver have stepping off the edge of a 5-m platform?  
  a.   3,675 J  
  b.   147 J  
  c.   375 J  
  d.   15 J  
  Hint    
      
  6.During energy transformations, energy is never __________.  
  a.   released as heat  
  b.   completely transformed  
  c.   used to increase an object's potential energy  
  d.   created or destroyed  
  Hint    
      
  7.The total amount of potential and kinetic energy in a system is called __________.  
  a.   complete energy  
  b.   mechanical energy  
  c.   energy maximum  
  d.   thermal energy  
  Hint    
      
  8.__________ is the ability to cause change.  
  a.   Power  
  b.   Energy  
  c.   Momentum  
  d.   Work  
  Hint    
      
  9.Which of the following is NOT a form of energy?  
  a.   friction  
  b.   electrical  
  c.   chemical  
  d.   thermal  
  Hint    
      
  10.What two factors determine how much kinetic energy an object has?  
  a.   speed and surface area  
  b.   speed and position  
  c.   position and mass  
  d.   speed and mass  
  Hint    
      
  11.The law of conservation of energy states that __________.  
  a.   energy cannot be created or destroyed  
  b.   when energy is transformed, the total energy of a system is less than it was before the change  
  c.   energy is not created or destroyed and its form is constant  
  d.   energy can be created and destroyed but cannot change form  
  Hint    
      
  12.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 leaves the bat  
  c.   when it reaches its highest point  
  d.   when the mechanical and kinetic energies of the baseball are equal  
  Hint    
      
  13.Which of the following objects has potential energy?  
  a.   a glass sitting on a table  
  b.   a bicycle coasting down a hill  
  c.   a ball rolling across the floor  
  d.   a bowling ball knocking over a pin  
  Hint    
      
  14.By what process does the Sun produce enough energy to warm Earth?  
  a.   transformation of thermal energy into kinetic energy  
  b.   glycolysis  
  c.   catabolism  
  d.   nuclear fusion  
  Hint    
      
  15.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    
      
  16.Which of the following objects has kinetic energy?  
  a.   leaves lying on the ground beneath a tree  
  b.   a bicycle parked at the top of a hill  
  c.   a sunny windowsill  
  d.   a ball rolling across the floor  
  Hint    
      
  17.What two factors determine how much gravitational potential energy is in an object?  
  a.   weight of the object and height above the ground  
  b.   weight and speed of the object  
  c.   shape of the object and its position relative to the ground  
  d.   shape and speed of the object  
  Hint    
      
  18.Carbohydrates and proteins each supply about __________ Calories of energy per gram.  
  a.   14  
  b.   40  
  c.   4  
  d.   400  
  Hint    
      
  19.One food Calorie is equivalent to approximately __________.  
  a.   4,000 J  
  b.   4 J  
  c.   400 J  
  d.   40 J  
  Hint    
      
  20.Energy stored in chemical bonds is __________.  
  a.   thermal potential energy  
  b.   chemical kinetic energy  
  c.   energy of activation  
  d.   chemical potential energy  
  Hint    

 
   
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