Transcript energytypesx

Energy
What is energy?
• Energy is the ability to do work.
Law of Conservation of
Energy
• Energy cannot be created or
destroyed.
There are two states of
energy or types of
energy .
• Potential and kinetic.
Potential
• Potential is stored energy
Kinetic
• Kinetic is the energy of motion.
There are five main
forms of energy.
•
•
•
•
•
Chemical
Mechanical
Electromagnetic
Heat (thermal)
Nuclear
Chemical Energy
• Energy that is available for release
from chemical reactions.
Mechanical Energy
• Energy due to a
object’s motion
(kinetic) or position
(potential).
Electromagnetic
oLight energy
o Includes energy from
gamma rays, xrays,
ultraviolet rays, visible
light, infrared rays,
microwave and radio
bands
oMoving electric
charges
Heat or Thermal
• Internal motion of
atoms.
• The heat energy of
an object
determines how
active its atoms are.
Nuclear
• Nuclear energy is the
energy stored in the
nucleus of an atom
and can be broken
into:
• fusion (energy of the
sun which is the
combing of two or
more nuclei) and
• fission(the splitting
of an atom like in a
nuclear reactor).
Energy Transfer
Sound
(mechanical)
Thermal
Electrical
Mechanical
Chemical
Light
(Electromagnetic)
There are three types of
(energy) heat transfer.
• Convection
• Conduction
• Radiation
Convection
• Convection is the transfer of
heat energy in a gas or liquid by
movement of currents due to
changes in density.
Conduction
• is the transfer of energy through
matter from particle to particle.
Radiation
• Allows heat to be transferred
through wave energy.
Renewable
• Renewable
resources are
those resources
that can be
replaced as they
are used up. Some
examples include:
• soil
• air
• water
• wood
• sunlight
Non-Renewable
• Nonrenewable
resource are those
natural resources
that cannot be
replaced once they
are used up. Some
examples include:
• oil
• coal
• gas
• uranium
In fact …..
NOTHING
would
happen
without
ENERGY