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Energy

Practice Test
      
  1.Which of the following objects has kinetic energy?  
  a.   a ball rolling across the floor  
  b.   a bicycle parked at the top of a hill  
  c.   leaves lying on the ground beneath a tree  
  d.   a sunny windowsill  
  Hint    
      
  2.Which of the following is NOT a form of energy?  
  a.   electrical  
  b.   thermal  
  c.   chemical  
  d.   friction  
  Hint    
      
  3.Which of the following objects has potential energy?  
  a.   a glass sitting on a table  
  b.   a bicycle coasting down a hill  
  c.   a bowling ball knocking over a pin  
  d.   a ball rolling across the floor  
  Hint    
      
  4.__________ is energy stored by things that stretch or compress.  
  a.   Gravitational potential  
  b.   Elastic potential energy  
  c.   Elastic kinetic energy  
  d.   Chemical kinetic energy  
  Hint    
      
  5.__________ is the energy stored in an object due to its position.  
  a.   Potential energy  
  b.   Entropy  
  c.   Thermal energy  
  d.   Kinetic energy  
  Hint    
      
  6.The __________ is the SI unit of energy.  
  a.   joule  
  b.   ampere  
  c.   volt  
  d.   watt  
  Hint    
      
  7.What two factors determine how much potential energy an object has?  
  a.   speed and position  
  b.   speed and mass  
  c.   speed and surface area  
  d.   mass and position  
  Hint    
      
  8.By what process does the Sun produce enough energy to warm Earth?  
  a.   glycolysis  
  b.   catabolism  
  c.   transformation of thermal energy into kinetic energy  
  d.   nuclear fusion  
  Hint    
      
  9.__________ is the ability to cause change.  
  a.   Work  
  b.   Momentum  
  c.   Energy  
  d.   Power  
  Hint    
      
  10.The law of conservation of energy states that __________.  
  a.   when energy is transformed, the total energy of a system is less than it was before the change  
  b.   energy can be created and destroyed but cannot change form  
  c.   energy cannot be created or destroyed  
  d.   energy is not created or destroyed and its form is constant  
  Hint    
      
  11.Which of the following vehicles has the most kinetic energy?  
  a.   a 900-kg car traveling 80 km/h  
  b.   a 300-kg motorcycle traveling 100 km/h  
  c.   a 1,100-kg car traveling 60 km/h  
  d.   a 2000-kg truck traveling 50 km/h  
  Hint    
      
  12.Energy stored in chemical bonds is __________.  
  a.   thermal potential energy  
  b.   chemical kinetic energy  
  c.   chemical potential energy  
  d.   energy of activation  
  Hint    
      
  13.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    
      
  14.As energy transformations occur within a system, the total energy of the system __________.  
  a.   remains constant  
  b.   decreases  
  c.   increases  
  d.   is transferred out of the system  
  Hint    
      
  15.A baseball is hit into the air with a bat. When does the baseball have the greatest gravitational potential energy?  
  a.   when the mechanical and kinetic energies of the baseball are equal  
  b.   when it leaves the bat  
  c.   when it hits the ground  
  d.   when it reaches its highest point  
  Hint    
      
  16.Carbohydrates and proteins each supply about __________ Calories of energy per gram.  
  a.   40  
  b.   14  
  c.   4  
  d.   400  
  Hint    
      
  17.How much kinetic energy does a moving object have if its mass is 100 kg and it is moving at a speed of 5 meters per second?  
  a.   2,500 J  
  b.   250 J  
  c.   125,000 J  
  d.   1,250 J  
  Hint    
      
  18.One food Calorie is equivalent to approximately __________.  
  a.   40 J  
  b.   4 J  
  c.   400 J  
  d.   4,000 J  
  Hint    
      
  19.What two factors determine how much gravitational potential energy is in an object?  
  a.   weight and speed of the object  
  b.   weight of the object and height above the ground  
  c.   shape and speed of the object  
  d.   shape of the object and its position relative to the ground  
  Hint    
      
  20.What two factors determine how much kinetic energy an object has?  
  a.   speed and position  
  b.   speed and surface area  
  c.   position and mass  
  d.   speed and mass  
  Hint    

 
   
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