Energy is defined as the ability to do work or cause change Work is done when a force causes an...
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Types of Energy and Waves Mr. Hollander’s 8 th Grade Science Class
Energy is defined as the ability to do work or cause change Work is done when a force causes an object to move in the direction of that force – Examples:
Energy is defined as the ability to do work or cause change
Work is done when a force causes an object to move in the direction
of that force Examples: Pushing a book off of the table is work and
energy allows this work to take place Energy is all around us all
of the time being harnessed and expressed in different ways
Slide 4
Kinetic energy is the energy of motion and/or movement This is
dependent on the mass and speed of an object Note: Speed has more
of an effect Potential energy is energy that is stored and has the
potential to do something There are three types of P.E. Elastic
Rubber band pulled back Gravitational Raising an object off of the
ground (height & mass) Chemical A log being placed on a fire
Kinetic energy is the energy of motion and/or movement This is
dependent on the mass and speed of an object Note: Speed has more
of an effect Potential energy is energy that is stored and has the
potential to do something There are three types of P.E. Elastic
Rubber band pulled back Gravitational Raising an object off of the
ground (height & mass) Chemical A log being placed on a
fire
Slide 5
Mechanical The total kinetic and potential energy of motion and
position of an object Thermal The kinetic energy due to random
motion of the particles that make up an object (Temperature and
Number of Particles) Chemical The potential energy of a compound
that changes as its atoms are rearranged Electrical The potential
or kinetic energy of charged electrons Sound The kinetic energy
caused by an objects vibrations Light The kinetic energy caused by
the vibrations of electrically charged particles Nuclear The
potential energy caused by changes in the nucleus of an atom
Mechanical The total kinetic and potential energy of motion and
position of an object Thermal The kinetic energy due to random
motion of the particles that make up an object (Temperature and
Number of Particles) Chemical The potential energy of a compound
that changes as its atoms are rearranged Electrical The potential
or kinetic energy of charged electrons Sound The kinetic energy
caused by an objects vibrations Light The kinetic energy caused by
the vibrations of electrically charged particles Nuclear The
potential energy caused by changes in the nucleus of an atom
Slide 6
Conservation of Energy is the idea that energy is not created
or destroyed, but it can only change forms Energy conversion
explains this change from one form to another and happens all
around useverydayall the time!!! Example: A car uses chemical
energy in a battery to create electrical energy to power an
electric starter motor. This motor uses the electrical energy to
create mechanical energy to start a vehicle. The vehicle converts
chemical energy into mechanical energy to make the vehicle go.
Conservation of Energy is the idea that energy is not created or
destroyed, but it can only change forms Energy conversion explains
this change from one form to another and happens all around
useverydayall the time!!! Example: A car uses chemical energy in a
battery to create electrical energy to power an electric starter
motor. This motor uses the electrical energy to create mechanical
energy to start a vehicle. The vehicle converts chemical energy
into mechanical energy to make the vehicle go.
Slide 7
Waves are a disturbance which transfer energy from one point to
another with little or no transfer of matter There are several
parts of a wave: Crest The section of the wave above the
undisturbed portion Trough The section of the wave below the
undisturbed portion Amplitude The positive and negative amount of
energy due to the disturbance Wavelength The distance between any
two corresponding positions Crest to Crest, Trough to Trough, Cycle
to Cycle Cycle Start of the crest to the end of the trough Period
The time of one complete cycle Waves are a disturbance which
transfer energy from one point to another with little or no
transfer of matter There are several parts of a wave: Crest The
section of the wave above the undisturbed portion Trough The
section of the wave below the undisturbed portion Amplitude The
positive and negative amount of energy due to the disturbance
Wavelength The distance between any two corresponding positions
Crest to Crest, Trough to Trough, Cycle to Cycle Cycle Start of the
crest to the end of the trough Period The time of one complete
cycle
Slide 8
Mechanical Waves Require a material medium to travel (air,
water, ropes, etc.) Three types of M.W. Transverse; Up and Down
(Pebble in a Pond) Longitudinal; Side to Side (Sound) Surface; Both
transverse & longitudinal (Earthquakes) Electromagnetic Waves
Do not require a material medium to travel (Light, Radio, Gamma)
Mechanical Waves Require a material medium to travel (air, water,
ropes, etc.) Three types of M.W. Transverse; Up and Down (Pebble in
a Pond) Longitudinal; Side to Side (Sound) Surface; Both transverse
& longitudinal (Earthquakes) Electromagnetic Waves Do not
require a material medium to travel (Light, Radio, Gamma)
Slide 9
Energy is defined as the ability to do work or cause change
Kinetic energy is the energy of motion and/or movement (mass and
speed) and potential energy is energy that is stored The
conservation of energy is the idea that energy cannot be created or
destroyed but can only change forms There are several types of
energy; mechanical, thermal, chemical, electrical, sound, light and
nuclear, this is constantly being converted from one form to
another due to energy conversion Waves are a disturbance which
transfer energy from one point to another with little or no
transfer of matter Mechanical waves require a medium in which to
travel and an electromagnetic wave does not require a medium Energy
is defined as the ability to do work or cause change Kinetic energy
is the energy of motion and/or movement (mass and speed) and
potential energy is energy that is stored The conservation of
energy is the idea that energy cannot be created or destroyed but
can only change forms There are several types of energy;
mechanical, thermal, chemical, electrical, sound, light and
nuclear, this is constantly being converted from one form to
another due to energy conversion Waves are a disturbance which
transfer energy from one point to another with little or no
transfer of matter Mechanical waves require a medium in which to
travel and an electromagnetic wave does not require a medium