Lesson 3
ENERGY TRANSFORMATIONS
ENERGY
Turbine Generators spin to cause copper wire
and magnets to create electricity.
 Water, wind and steam are what spin a turbine.
 Turbine – A machine with blades that spin

Answer the 3
questions on
the back of
your student
reading page.
LAW OF CONSERVATION OF ENERGY



Energy can be neither created nor destroyed.
Energy can only be transformed from one form to another
Energy is constant
Laws of Thermodynamics
• Total amount of energy in the universe is constant. Energy
can be neither created nor destroyed, but it can be changed
from one form to another
ENERGY
The ability to do work or create change
 Energy can be potential (stored) or kinetic

 Potential
(stored) energy: energy that is stored in
some way
 Kinetic energy: energy of motion, involves
movement of some kind
POTENTIAL ENERGIES
Write the definition
 Write 1 example

GRAVITATIONAL ENERGY


Energy an object has
due to place or
position, such as its
height above the
Earth; a form of
potential energy
Rock on the edge of a
cliff, water behind a
dam.
CHEMICAL ENERGY


Energy stored in the
chemical bonds
between atoms and
molecules
Energy plants store
by photosynthesis,
any food we eat, coal,
oil
NUCLEAR ENERGY


Energy stored in the
nucleus of an atom;
the energy that holds
an atom together;
sometimes called
atomic energy
Uranium in a nuclear
power plant and
plutonium in a bomb
YOUR PAPER
DefinitionExampleDefinitionExampleDefinitionExample-
DefinitionExample-
DefinitionExample-
MECHANICAL (MOTION) ENERGY


The energy of an
object or substance
in movement;
sometimes just called
kinetic energy
Person dancing, car
in motion, a thrown
ball, flowing water.
ELECTRIC ENERGY


The energy of
electrons moving or
flowing within a
substance
Power lines or home
wiring, electricity from
a battery
LIGHT ENERGY


Electromagnetic
energy that travels in
waves; also called
radiant energy
Sunlight, the light of a
lamp or of a TV, or
computer monitor
THERMAL (HEAT) ENERGY


The internal energy of a
substance due to
random vibration and
movement of its atoms
and molecules; also
called thermal energy.
Heat form the burner of
a stove, charcoal grill,
forest fire.
SOUND ENERGY


Energy that moves
through substances
by compression
waves; sound
Any kind of sound
from humans,
machines, animals,
Ipods
ENERGY TRANSFORMATIONS
Review:
Energy can be neither created nor destroyed, but
it can be transformed.
 Light
bulbs convert electric energy to light energy
 Movement of our bodies converts chemical energy
to kinetic energy
 School bell converts electric energy to sound
energy
 Coal to electricity to light
 Natural gas to heat to stove
Brainpop: Forms of energy