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Energy

Practice Test
      
  1.Which of the following is NOT a form of energy?  
  a.   friction  
  b.   thermal  
  c.   chemical  
  d.   electrical  
  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.Which of the following objects has potential energy?  
  a.   a bicycle coasting down a hill  
  b.   a ball rolling across the floor  
  c.   a glass sitting on a table  
  d.   a bowling ball knocking over a pin  
  Hint    
      
  4.What is a joule?  
  a.   a unit of energy that depends on both an object's mass and velocity  
  b.   the unit of measurement describing the change in velocity in a unit time  
  c.   a unit measuring the amount of energy we get from various foods  
  d.   the unit of force required to move 1 kg of mass 1 m/s/s  
  Hint    
      
  5.__________ is the ability to cause change.  
  a.   Energy  
  b.   Work  
  c.   Power  
  d.   Momentum  
  Hint    
      
  6.Energy stored in chemical bonds is __________.  
  a.   chemical potential energy  
  b.   energy of activation  
  c.   thermal potential energy  
  d.   chemical kinetic energy  
  Hint    
      
  7.One food Calorie is equivalent to approximately __________.  
  a.   4,000 J  
  b.   40 J  
  c.   4 J  
  d.   400 J  
  Hint    
      
  8.What two factors determine how much potential energy an object has?  
  a.   speed and surface area  
  b.   speed and position  
  c.   speed and mass  
  d.   mass and position  
  Hint    
      
  9.By what process does the Sun produce enough energy to warm Earth?  
  a.   catabolism  
  b.   glycolysis  
  c.   nuclear fusion  
  d.   transformation of thermal energy into kinetic energy  
  Hint    
      
  10.What two factors determine how much kinetic energy an object has?  
  a.   position and mass  
  b.   speed and position  
  c.   speed and surface area  
  d.   speed and mass  
  Hint    
      
  11.__________ is the energy stored in an object due to its position.  
  a.   Entropy  
  b.   Kinetic energy  
  c.   Potential energy  
  d.   Thermal energy  
  Hint    
      
  12.What two factors determine how much gravitational potential energy is in an object?  
  a.   weight of the object and height above the ground  
  b.   shape and speed of the object  
  c.   weight and speed of the object  
  d.   shape of the object and its position relative to the ground  
  Hint    
      
  13.Carbohydrates and proteins each supply about __________ Calories of energy per gram.  
  a.   4  
  b.   40  
  c.   400  
  d.   14  
  Hint    
      
  14.Which of the following objects has kinetic energy?  
  a.   a bicycle parked at the top of a hill  
  b.   a ball rolling across the floor  
  c.   a sunny windowsill  
  d.   leaves lying on the ground beneath a tree  
  Hint    
      
  15.__________ 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    
      
  16.The law of conservation of energy states that __________.  
  a.   energy can be created and destroyed but cannot change form  
  b.   energy cannot be created or destroyed  
  c.   when energy is transformed, the total energy of a system is less than it was before the change  
  d.   energy is not created or destroyed and its form is constant  
  Hint    
      
  17.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 the mechanical and kinetic energies of the baseball are equal  
  d.   when it leaves the bat  
  Hint    
      
  18.The __________ is the SI unit of energy.  
  a.   watt  
  b.   joule  
  c.   ampere  
  d.   volt  
  Hint    
      
  19.Without changing the mass of a moving object, doubling its velocity will __________ its kinetic energy.  
  a.   double  
  b.   not affect  
  c.   triple  
  d.   quadruple  
  Hint    
      
  20.Which of the following vehicles has the most kinetic energy?  
  a.   a 2000-kg truck traveling 50 km/h  
  b.   a 900-kg car traveling 80 km/h  
  c.   a 300-kg motorcycle traveling 100 km/h  
  d.   a 1,100-kg car traveling 60 km/h  
  Hint    

 
   
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