Download Chapter 13 Energy

8th Grade
 The ability to do work is called
 A. velocity
 B. energy
 C. conversion
 D. friction
B
 Energy is measured in units called
 A. joules
 B. pounds
 C. meters
 D. horsepower
A
 The energy associated with motion is called
 A. kinetic energy
 B. elastic potential energy
 C. gravitational potential energy
 D. nuclear energy
A
 Kinetic energy increases as
 A. mass increases and velocity decreases
 B. mass decreases and velocity increases
 C. both mass and velocity increase
 D. both mass and velocity decrease
C
 Moving water can be used to produce electricity because
 A. most forms of energy can be converted into other
forms
 B. energy cannot be converted into other forms
 C. potential energy can be converted into kinetic energy,
but not vice versa
 D. kinetic energy can be converted into potential energy,
but not vice versa
 A.
 What type of conversion is taking place when natural
gas is used to heat water?
 A. chemical to thermal
 B. thermal to mechanical
 C. mechanical to electromagnetic
 D. electromagnetic to chemical
A
 When you rub your hands together on a cold day, you
use friction to convert
 A. mechanical to thermal
 B. thermal to nuclear
 C. nuclear to electrical
 D. electrical to electromagnetic
A
 The scientist who suggested that energy can be created
under certain conditions was
 A. Newton
 B. Einstein
 C. Wright
 D. Pascal
B
 The rate at which energy is transferred is called
 A. Joules
 B. Power
 C. Work
 D. Time
B
 Niagara Falls is a good example of
 A. kinetic energy being converted into potential energy
 B. potential energy being converted into kinetic energy
 C. energy being lost
 D. energy being created
B
 Visible light is an example of
 A. chemical energy
 B. electrical energy
 C. electromagnetic energy
 D. nuclear energy
 C.
 What type of energy does a spinning turbine have?
 A. electrical
 B. nuclear
 C. thermal
 D. mechanical
D
 When generators spin turbines, they
 A. produce nuclear energy
 B. store potential energy
 C. produce electricity
 D. burn fossil fuels
C
 Unlike kinetic energy, potential energy is
 A. energy of motion
 B. stored
 C. conserved
 D. not measurable
B
 The type of energy stored by fossil fuels such as coal is
 A. kinetic
 B. mechanical
 C. chemical
 D. electromagnetic
C
 The process of burning a fuel is called
 A. combustion
 B. meltdown
 C. acceleration
 D. conduction
 A.
Energy Transformations
 Where is the greatest potential energy?
 The top baseball
 Where is the greatest kinetic energy?
 On the side going down
 Where is the least potential energy?
 On the side going down
 Where is the least kinetic energy?
 The top baseball
 Fossil fuels contain energy that originally came from
 A. tidal forces
 B. Earth’s core
 C. the sun
 D. dinosaurs
C
 What type of energy is released when fossil fuels are
burned?
 A. electrical
 B. nuclear
 C. kinetic
 D. chemical
D
 A pole-vaulter first converts kinetic energy into
 A. thermal
 B. chemical
 C. mechanical
 D. elastic potential
D
 How would you calculate an object’s mechanical energy?




A. Add its kinetic and potential energies
B. Multiply its kinetic and potential energies
C. Subtract its kinetic energy from its potential energy
D. Subtract is potential energy from its kinetic energy
A
True or False
 When fossil fuels are burned, they release energy
stored thousands of years ago.
 FALSE
 MILLIONS
True or False
 If you add an object’s potential and kinetic energies,
you get its mechanical energy
 TRUE
True or False
 During combustion, a fuel’s electromagnetic energy is
converted into thermal energy.
 FALSE
 CHEMICAL
True or False
 A ball thrown into the air has its greatest kinetic
energy as it reaches the highest point in its path.
 FALSE
 POTENTIAL
True or False
 In a machine, work output is less than work input
because some energy is converted into thermal energy.
 TRUE
Energy Transformations
 Is the potential energy
Changing at position
5?
 No it is neither increasing
Or decreasing.
True or False
 A light bulb converts electrical energy into
electromagnetic energy.
 TRUE
True or False
 An ice cube melts when its mechanical energy
increases.
 FALSE
 THERMAL ENERGY
True or False
 A compressed spring has elastic potential energy.
 TRUE
True or False
 The kinetic energy of a book on a shelf is equal to the
work done to lift the book to the shelf.
 FALSE
 GRAVITATIONAL POTENTIAL ENERGY
True or False
 When work is done on an object, the object gains
energy.
 TRUE
 An electric motor converts electrical energy to
____________ energy.
 Mechanical
 The law of ______________ states that energy cannot be
created or destroyed.
 CONSERVATION OF ENERGY
Energy Transformations
 How is the kinetic and potential energies changing at
position 2?
 Potential is decreasing
 Kinetic is increasing
 Describe kinetic and potential
Changing at position 4?
 Potential is increasing
 Kinetic is decreasing
 Is the potential energy
Changing at position
5?
 Fossil fuels contain _________ energy stored millions of
years ago.
 CHEMICAL
 In coal-fired power plants, coal is burned to produce
__________, which is then used to turn a turbine.
 STEAM
 Work is the transfer of ________ from one object to
another.
 ENERGY
 Mechanical energy is associated with the ________ and
motion of an object.
 POSITION
 As a pendulum swings, energy is continuously
transformed between kinetic energy and ________
energy.
 POTENTIAL
 The energy transformation in a car’s engine are an
example of __________ transformations.
 MULTIPLE
 A baseball flying through the air has ___________
energy because of its motion.
 KINETIC
 As water runs over a waterfall, its potential energy is
converted into _________ energy.
 KINETIC