What is it?
Energy is
the ability
to do
work.
Work is
moving any
object.
Law of Conservation of Energy.
Energy cannot be
created or destroyed,
but it can transform
from one form to
another.
Just remember MELTS + C
Mechanical
Electrical
Light
Thermal
Sound
Chemical
Mechanical Energy
Mechanical energy is the energy
associated with the motion or
movement of an object.
Examples: a frog leaping, a car
moving
Electrical Energy


Electrical energy is energy associated
with moving electric charges.
Example: energy in power lines, or
devices that use electrical energy to
power them
Light Energy
Movement
of light
waves.
What examples do
you see?
Thermal Energy

Thermal (or heat) energy is a measure of the energy
of the movement of particles (molecules) in an object.
Example:
ice cream
melting, frying
an egg

Sound Energy
Movement of
sound waves.
What examples do
you see?
Chemical Energy


Produced
through a
chemical
reaction.
Ex. the food you
eat, gasoline,
batteries
Battery

Batteries are all over the place -- in our cars,
our PCs, laptops, portable MP3 players and
cell phones. A battery is essentially a can full
of chemicals that produce electrons.
3-2-1


Respond to the following:
3 – 3 things in the room that have
electrical energy at the moment

2 – 2 things in the room that have light
energy at the moment

1 – 1 question you still have about
forms of energy.
Transformations Between Forms of Energy
• A change from one form of
energy to another is called an
energy transformation.
• Example: a toaster converts
electrical energy into thermal
energy
•Playing an instrument involves:
having the energy in your body > moving your fingers > creating sound.
CHEMICAL (through digestion) > MECHANICAL (muscles) > SOUND
Transformations Between Forms of
Energy
• How is the energy
transforming?
________
________
Transformations Between Forms of
Energy
• How is the energy
transforming?
________
________