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Quizzes Quiz

Practice Test
  1.__________ is the ability to cause change.  
  a.   Momentum  
  b.   Power  
  c.   Work  
  d.   Energy  
  2.__________ is the energy stored in an object due to its position.  
  a.   Kinetic energy  
  b.   Entropy  
  c.   Thermal energy  
  d.   Potential energy  
  3.Carbohydrates and proteins each supply about __________ Calories of energy per gram.  
  a.   400  
  b.   14  
  c.   40  
  d.   4  
  4.Which of the following objects has kinetic energy?  
  a.   a sunny windowsill  
  b.   a bicycle parked at the top of a hill  
  c.   a ball rolling across the floor  
  d.   leaves lying on the ground beneath a tree  
  5.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  
  6.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.   2,500 J  
  d.   125,000 J  
  7.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  
  8.As energy transformations occur within a system, the total energy of the system __________.  
  a.   increases  
  b.   is transferred out of the system  
  c.   remains constant  
  d.   decreases  
  9.What two factors determine how much gravitational potential energy is in an object?  
  a.   weight of the object and height above the ground  
  b.   weight and speed of the object  
  c.   shape of the object and its position relative to the ground  
  d.   shape and speed of the object  
  10.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  
  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.   375 J  
  c.   3,675 J  
  d.   147 J  
  12.During energy transformations, energy is never __________.  
  a.   completely transformed  
  b.   used to increase an object's potential energy  
  c.   released as heat  
  d.   created or destroyed  
  13.__________ is energy stored by things that stretch or compress.  
  a.   Chemical kinetic energy  
  b.   Elastic potential energy  
  c.   Gravitational potential  
  d.   Elastic kinetic energy  
  14.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.  
  15.Energy stored in chemical bonds is __________.  
  a.   chemical potential energy  
  b.   thermal potential energy  
  c.   energy of activation  
  d.   chemical kinetic energy  
  16.Without changing the mass of a moving object, doubling its velocity will __________ its kinetic energy.  
  a.   triple  
  b.   quadruple  
  c.   double  
  d.   not affect  
  17.What two factors determine how much potential energy an object has?  
  a.   mass and position  
  b.   speed and mass  
  c.   speed and surface area  
  d.   speed and position  
  18.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  
  19.The __________ is the SI unit of energy.  
  a.   joule  
  b.   watt  
  c.   ampere  
  d.   volt  
  20.Which of the following objects has potential energy?  
  a.   a bicycle coasting down a hill  
  b.   a bowling ball knocking over a pin  
  c.   a glass sitting on a table  
  d.   a ball rolling across the floor  

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