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Energy

Practice Test
      
  1.What two factors determine how much gravitational potential energy is in an object?  
  a.   weight and speed of the object  
  b.   shape and speed of the object  
  c.   weight of the object and height above the ground  
  d.   shape of the object and its position relative to the ground  
  Hint    
      
  2.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.   250 J  
  b.   1,250 J  
  c.   125,000 J  
  d.   2,500 J  
  Hint    
      
  3.How much gravitational potential energy does a 75-kg diver have stepping off the edge of a 5-m platform?  
  a.   15 J  
  b.   3,675 J  
  c.   147 J  
  d.   375 J  
  Hint    
      
  4.The __________ is the SI unit of energy.  
  a.   ampere  
  b.   volt  
  c.   watt  
  d.   joule  
  Hint    
      
  5.By what process does the Sun produce enough energy to warm Earth?  
  a.   nuclear fusion  
  b.   catabolism  
  c.   transformation of thermal energy into kinetic energy  
  d.   glycolysis  
  Hint    
      
  6.One food Calorie is equivalent to approximately __________.  
  a.   4 J  
  b.   4,000 J  
  c.   400 J  
  d.   40 J  
  Hint    
      
  7.Which of the following vehicles has the most kinetic energy?  
  a.   a 300-kg motorcycle traveling 100 km/h  
  b.   a 900-kg car traveling 80 km/h  
  c.   a 1,100-kg car traveling 60 km/h  
  d.   a 2000-kg truck traveling 50 km/h  
  Hint    
      
  8.The total amount of potential and kinetic energy in a system is called __________.  
  a.   thermal energy  
  b.   energy maximum  
  c.   complete energy  
  d.   mechanical energy  
  Hint    
      
  9.What two factors determine how much kinetic energy an object has?  
  a.   speed and mass  
  b.   speed and surface area  
  c.   speed and position  
  d.   position and mass  
  Hint    
      
  10.__________ is the ability to cause change.  
  a.   Energy  
  b.   Momentum  
  c.   Power  
  d.   Work  
  Hint    
      
  11.Which of the following is NOT a form of energy?  
  a.   electrical  
  b.   friction  
  c.   thermal  
  d.   chemical  
  Hint    
      
  12.What two factors determine how much potential energy an object has?  
  a.   mass and position  
  b.   speed and position  
  c.   speed and mass  
  d.   speed and surface area  
  Hint    
      
  13.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 hits the ground  
  c.   when it reaches its highest point  
  d.   when it leaves the bat  
  Hint    
      
  14.What is a joule?  
  a.   a unit measuring the amount of energy we get from various foods  
  b.   the unit of force required to move 1 kg of mass 1 m/s/s  
  c.   a unit of energy that depends on both an object's mass and velocity  
  d.   the unit of measurement describing the change in velocity in a unit time  
  Hint    
      
  15.Energy stored in chemical bonds is __________.  
  a.   energy of activation  
  b.   chemical kinetic energy  
  c.   thermal potential energy  
  d.   chemical potential energy  
  Hint    
      
  16.__________ is energy stored by things that stretch or compress.  
  a.   Chemical kinetic energy  
  b.   Gravitational potential  
  c.   Elastic potential energy  
  d.   Elastic kinetic energy  
  Hint    
      
  17.__________ is the energy stored in an object due to its position.  
  a.   Potential energy  
  b.   Thermal energy  
  c.   Kinetic energy  
  d.   Entropy  
  Hint    
      
  18.During energy transformations, energy is never __________.  
  a.   created or destroyed  
  b.   used to increase an object's potential energy  
  c.   released as heat  
  d.   completely transformed  
  Hint    
      
  19.Which of the following objects has potential energy?  
  a.   a glass sitting on a table  
  b.   a bowling ball knocking over a pin  
  c.   a bicycle coasting down a hill  
  d.   a ball rolling across the floor  
  Hint    
      
  20.The law of conservation of energy states that __________.  
  a.   energy is not created or destroyed and its form is constant  
  b.   when energy is transformed, the total energy of a system is less than it was before the change  
  c.   energy can be created and destroyed but cannot change form  
  d.   energy cannot be created or destroyed  
  Hint    

 
   
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