Science Home Product Information Site Map Search Contact Us   Glencoe Online
Quizzes Quiz
 
Energy

Practice Test
      
  1.By what process does the Sun produce enough energy to warm Earth?  
  a.   catabolism  
  b.   transformation of thermal energy into kinetic energy  
  c.   glycolysis  
  d.   nuclear fusion  
  Hint    
      
  2.The law of conservation of energy states that __________.  
  a.   energy is not created or destroyed and its form is constant  
  b.   energy cannot be created or destroyed  
  c.   energy can be created and destroyed but cannot change form  
  d.   when energy is transformed, the total energy of a system is less than it was before the change  
  Hint    
      
  3.__________ is the ability to cause change.  
  a.   Energy  
  b.   Work  
  c.   Power  
  d.   Momentum  
  Hint    
      
  4.Without changing the mass of a moving object, doubling its velocity will __________ its kinetic energy.  
  a.   not affect  
  b.   triple  
  c.   quadruple  
  d.   double  
  Hint    
      
  5.Which of the following objects has potential energy?  
  a.   a glass sitting on a table  
  b.   a ball rolling across the floor  
  c.   a bowling ball knocking over a pin  
  d.   a bicycle coasting down a hill  
  Hint    
      
  6.What is a joule?  
  a.   a unit of energy that depends on both an object's mass and velocity  
  b.   the unit of force required to move 1 kg of mass 1 m/s/s  
  c.   the unit of measurement describing the change in velocity in a unit time  
  d.   a unit measuring the amount of energy we get from various foods  
  Hint    
      
  7.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    
      
  8.As energy transformations occur within a system, the total energy of the system __________.  
  a.   decreases  
  b.   increases  
  c.   remains constant  
  d.   is transferred out of the system  
  Hint    
      
  9.Which of the following statements about an apple falling from a tree is true?  
  a.   Its kinetic energy decreases and its potential energy increases.  
  b.   Its potential energy decreases and its kinetic energy increases.  
  c.   Its kinetic and potential energies remain constant.  
  d.   Its mechanical energy increases.  
  Hint    
      
  10.__________ is the energy stored in an object due to its position.  
  a.   Kinetic energy  
  b.   Entropy  
  c.   Thermal energy  
  d.   Potential energy  
  Hint    
      
  11.How much gravitational potential energy does a 75-kg diver have stepping off the edge of a 5-m platform?  
  a.   15 J  
  b.   147 J  
  c.   3,675 J  
  d.   375 J  
  Hint    
      
  12.__________ is energy stored by things that stretch or compress.  
  a.   Elastic potential energy  
  b.   Chemical kinetic energy  
  c.   Gravitational potential  
  d.   Elastic kinetic energy  
  Hint    
      
  13.What two factors determine how much potential energy an object has?  
  a.   speed and position  
  b.   mass and position  
  c.   speed and surface area  
  d.   speed and mass  
  Hint    
      
  14.A baseball is hit into the air with a bat. When does the baseball have the greatest gravitational potential energy?  
  a.   when it leaves the bat  
  b.   when the mechanical and kinetic energies of the baseball are equal  
  c.   when it reaches its highest point  
  d.   when it hits the ground  
  Hint    
      
  15.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.   1,250 J  
  b.   2,500 J  
  c.   250 J  
  d.   125,000 J  
  Hint    
      
  16.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 2000-kg truck traveling 50 km/h  
  d.   a 1,100-kg car traveling 60 km/h  
  Hint    
      
  17.What two factors determine how much kinetic energy an object has?  
  a.   speed and position  
  b.   speed and mass  
  c.   position and mass  
  d.   speed and surface area  
  Hint    
      
  18.What two factors determine how much gravitational potential energy is in an object?  
  a.   shape and speed of the object  
  b.   shape of the object and its position relative to the ground  
  c.   weight of the object and height above the ground  
  d.   weight and speed of the object  
  Hint    
      
  19.Which of the following objects has kinetic energy?  
  a.   a ball rolling across the floor  
  b.   a sunny windowsill  
  c.   leaves lying on the ground beneath a tree  
  d.   a bicycle parked at the top of a hill  
  Hint    
      
  20.One food Calorie is equivalent to approximately __________.  
  a.   4,000 J  
  b.   400 J  
  c.   40 J  
  d.   4 J  
  Hint    

 
   
McGraw-Hill / Glencoe
The McGraw-Hill Companies