Download Types of energy_92914

11/14/14
Energy
Work
Energy
•  Makes objects move.
•  Makes things stop.
•  Is needed to do work.
TYPES OF
ENERGY
Work is done when
•  You climb.
•  You lift a bag of groceries.
•  You ride a bicycle.
•  You breathe.
•  Your heart pumps blood.
•  Water goes over a dam.
Mechanical,
Electromagnetic,
Electrical,
Chemical and Thermal
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Potential Energy
What is Mechanical Energy?
o  Energy due to a
Kinetic Energy
Potential energy is energy
stored for use at a later time.
object s motion
(kinetic) or position
(potential).
The bowling ball has
mechanical energy.
Kinetic energy is the
energy of matter in motion.
Examples are
•  Swimming.
•  Water flowing over a dam.
•  Working out.
•  Burning gasoline.
Examples are
•  Water behind a dam.
•  A compressed spring.
•  Chemical bonds in gasoline,
coal, or food.
When the ball strikes
the pins, mechanical
energy is transferred
to the pins!
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Units for Measuring Energy or Heat
Examples of Mechanical Energy
Heat is measured in Joules or calories.
• 
4.184 Joules (J) = 1 calorie (cal)
(exact)
• 
1 kJ = 1000 J
• 
1 kilocalorie (kcal) = 1000 calories
(cal)
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What is Electromagnetic
Energy?
o  Light energy
o  Includes energy
from gamma rays,
xrays, ultraviolet rays,
visible light, infrared
rays, microwave and
radio bands
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What is Electrical Energy?
o  Energy caused by
What is Chemical Energy?
the movement of
electrons
o  Energy that is
available for release
from chemical
reactions.
o  Easily transported
through power lines
and converted into
other forms of
energy
The chemical bonds
in a matchstick store
energy that is
transformed into
thermal energy when
the match is struck.
What is Thermal Energy?
QUIZ TIME!
energy is what we call
energy that comes from heat.
o  The heat energy of an object
determines how active its atoms
are.
What type of energy
cooks food in a
microwave oven?
ELECTROMAGNETIC
ENERGY
A hot object is one whose atoms and
molecules are excited and show rapid
movement.
What type of energy is
the spinning plate
inside of a microwave
oven?
MECHANICAL
ENERGY
o  Thermal
A cooler object's molecules and
atoms will show less movement.
QUIZ TIME!
Examples of Chemical Energy
QUIZ TIME!
Electrical energy is
transported to your house
through power lines.
When you plug an electric
fan to a power outlet,
electrical energy is
transform into what type of
energy?
MECHANICAL ENERGY
What types of energy are shown below?
What type of energy is shown below?
Mechanical and Thermal Energy
(Don t forget friction)
Chemical Energy
What energy transformation
occurs when an electric
lamp is turned on?
ELECTRICAL ENERGY
↓
ELECTROMAGNETIC
ENERGY
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What types of energy are shown below?
What type of energy is shown below?
What type of energy is shown below?
Electrical, Mechanical and
Electromagnetic Energy
Chemical Energy (yummy)
Thermal Energy
Energy Transfer
•  Draw a flow map showing the flow of
energy transformations in a car from
starting vehicle to driving. You should
have 5 different types of energy.
ic
ctr
Ele
Sound
(mechanical)
al
Thermal
Electrical
Chemical
Ele
ctr
ica
l
Mechanical
Light
(Electromagnetic)
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