Transcript TYPES OF ENERGY

TYPES OF
ENERGY
Mechanical,
Electromagnetic,
Electrical,
Chemical and Thermal
What is Mechanical Energy?
o Energy due to a
object’s motion (kinetic)
or position (potential).
The bowling ball has
mechanical energy.
When the ball strikes
the pins, mechanical
energy is transferred to
the pins!
Mechanical = Potential + Kinetic
• Mechanical
• The building up
energy is total
energy is
energy an object
potential. The
has (when
using up is
building up
kinetic. When
energy or when
you have a high
using it.)
number of one,
you have to
have a low
number of the
other.
Examples of Mechanical Energy
What is Electromagnetic
Energy?
o Light energy
o Includes energy from
gamma rays, xrays,
ultraviolet rays, visible
light, infrared rays,
microwave and radio
bands
What is Electrical Energy?
o Energy caused by
the movement of
electrons
o Easily transported
through power lines
and converted into
other forms of energy
What is Chemical Energy?
o Energy that is
available for release
from chemical
reactions.
The chemical bonds in
a matchstick store
energy that is
transformed into
thermal energy when
the match is struck.
Nuclear Energy
Nuclear Fusion
• The energy of
radiation and heat
are released when
the nuclei of atoms
become so close at
high speeds that
they collide and
form a new
nucleus.
Nuclear Fusion
Nuclear Energy
Nuclear Fission
• The energy of
radiation and heat
are released when
the nucleus of an
atom decays and
becomes the nuclei
of other atoms.
Nuclear Fission
Examples of Chemical Energy
What is Thermal Energy?
o Heat
energy
o The heat energy of an object determines
how active its atoms are.
A “hot” object is one whose atoms and
molecules are excited and show rapid
movement.
A “cold” object's molecules and atoms will
show less movement.
What types of energy are shown below?
Mechanical and Thermal Energy
(Don’t forget friction)
What type of energy is shown below?
Chemical Energy
What types of energy are shown below?
Electrical, Mechanical and
Electromagnetic Energy
Other Types of Energy
• Fossil Fuels (non-renewable)
• Hydroelectric - changing water
movement into electricity
• Solar energy – using a photovoltaic to
transform solar energy into electric
energy.
• Geothermal – using hot steam from areas
where underground water is heated by hot
rocks.
• Wind – Using the motion of wind (kinetic
energy) to change into electricity.
What type of energy is shown below?
Chemical Energy (ripening)
What type of energy is shown below?
Thermal Energy
Law of Conservation of Energy
• - You can’t create emery
• - You can’t destroy energy
• - ENERGY CAN ONLY
CHANGE FORM.
Cool Fact: The energy the universe
began with is the same amount of
energy that exists today and in the
future. It just constantly changes
form!
Energy Tranformation
• How does a car change energies? 5
DIFFERENT TIMES!
Energy Transfer
Sound
(mechanical)
Thermal
Electrical
Mechanical
Chemical
Light
(Electromagnetic)
THERMAL ENERGY
• Because of
friction, no
matter how
energy
transfers, some
of the energy
must be used to
overcome the
heat of friction.
So you always
have thermal
energy.
• There are 3 ways
that you can
transfer thermal
energy:
• Conduction
• Convection and
• Radiation
Conduction
What is it?
• Conduction is
when heat is
transferred
through touch.
This is how
solids transfer
heat.
What doe it look like?
Convection
What is it?
• Convection is when
fluids (gases or
liquids) transferred by
mixing the fast-moving
particles with slowermoving particles.
Boiling water and the
air/heating system in
your house are
examples.
What doe it look like?
Radiation
What doe it look like?
• Radiation is the
transfer of heat
through empty
What is it?
space. Think
about the sun’s
rays, or standing
in front of a fire.