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Quizzes Quiz

Practice Test
  1.Without changing the mass of a moving object, doubling its velocity will __________ its kinetic energy.  
  a.   quadruple  
  b.   not affect  
  c.   double  
  d.   triple  
  2.How much gravitational potential energy does a 75-kg diver have stepping off the edge of a 5-m platform?  
  a.   375 J  
  b.   3,675 J  
  c.   15 J  
  d.   147 J  
  3.__________ is the ability to cause change.  
  a.   Momentum  
  b.   Work  
  c.   Energy  
  d.   Power  
  4.Which of the following is NOT a form of energy?  
  a.   chemical  
  b.   thermal  
  c.   electrical  
  d.   friction  
  5.What is a joule?  
  a.   the unit of force required to move 1 kg of mass 1 m/s/s  
  b.   a unit measuring the amount of energy we get from various foods  
  c.   the unit of measurement describing the change in velocity in a unit time  
  d.   a unit of energy that depends on both an object's mass and velocity  
  6.During energy transformations, energy is never __________.  
  a.   used to increase an object's potential energy  
  b.   completely transformed  
  c.   released as heat  
  d.   created or destroyed  
  7.The __________ is the SI unit of energy.  
  a.   watt  
  b.   joule  
  c.   volt  
  d.   ampere  
  8.__________ is energy stored by things that stretch or compress.  
  a.   Elastic potential energy  
  b.   Elastic kinetic energy  
  c.   Chemical kinetic energy  
  d.   Gravitational potential  
  9.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  
  10.By what process does the Sun produce enough energy to warm Earth?  
  a.   catabolism  
  b.   nuclear fusion  
  c.   glycolysis  
  d.   transformation of thermal energy into kinetic energy  
  11.What two factors determine how much gravitational potential energy is in an object?  
  a.   shape of the object and its position relative to the ground  
  b.   weight of the object and height above the ground  
  c.   weight and speed of the object  
  d.   shape and speed of the object  
  12.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 cannot be created or destroyed  
  c.   energy is not created or destroyed and its form is constant  
  d.   energy can be created and destroyed but cannot change form  
  13.What two factors determine how much kinetic energy an object has?  
  a.   position and mass  
  b.   speed and surface area  
  c.   speed and mass  
  d.   speed and position  
  14.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.   125,000 J  
  b.   2,500 J  
  c.   250 J  
  d.   1,250 J  
  15.Carbohydrates and proteins each supply about __________ Calories of energy per gram.  
  a.   14  
  b.   4  
  c.   40  
  d.   400  
  16.The total amount of potential and kinetic energy in a system is called __________.  
  a.   mechanical energy  
  b.   complete energy  
  c.   energy maximum  
  d.   thermal energy  
  17.Which of the following statements about an apple falling from a tree is true?  
  a.   Its mechanical energy increases.  
  b.   Its potential energy decreases and its kinetic energy increases.  
  c.   Its kinetic and potential energies remain constant.  
  d.   Its kinetic energy decreases and its potential energy increases.  
  18.As energy transformations occur within a system, the total energy of the system __________.  
  a.   is transferred out of the system  
  b.   remains constant  
  c.   decreases  
  d.   increases  
  19.What two factors determine how much potential energy an object has?  
  a.   speed and surface area  
  b.   speed and position  
  c.   mass and position  
  d.   speed and mass  
  20.Energy stored in chemical bonds is __________.  
  a.   energy of activation  
  b.   thermal potential energy  
  c.   chemical potential energy  
  d.   chemical kinetic energy  

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