P. 62 4/20 FORMS OF ENERGY FOLDABLE
IQ: Decide which of the following contain
energy:
- A donut
- Charcoal
- A plant
- A car parked at the top of a hill
- A radio playing music
7 FORMS OF ENERGY
1)
2)
3)
4)
5)
6)
7)
Heat
Chemical
Light
Electrical
Mechanical
Sound
Nuclear
ENERGY
Definition:
Is the ability to do work or cause a change.
Interesting facts:
There are many different types of energy.
Measure in Joules (J)
All matter has energy!
1) HEAT ENERGY
(KINETIC)
Definition: the energy of moving particles of
matter, present in everything!
Examples: Solar, Fire, Body, electricity, friction,
Nuclear, Geothermal,etc
Interesting Info: There is more Heat Energy in
an Iceberg (more particles) than there is in a
boiling pot of water!
Pic/Symbol:
HEAT VS. TEMPERATURE
Heat depends on the number of particles
Temp. depends on the speed of particles
Which has more Heat?
Which has more Temp?
An unheated swimming pool or a cup of boiling
water?
Ice Sculpture or lit match?
2) LIGHT/RADIANT
ENERGY/ELECTROMAGNETIC (KINETIC)
Definition: Energy from the
Electromagnetic Spectrum (EMS)
Examples: Sun, light bulb,
lightning, UV rays etc.
Interesting Information: Light
energy is used to cook or heat up
food in the microwave.
Picture/Symbol:
3) SOUND ENERGY (KINETIC)
Definition: Energy created by vibrating objects.
Examples: sound from a speaker, radio, TV,
thunder, or someone’s voice
Interesting Information: Sound travels through
a medium and the speed of sound depends on
the density of the medium! Higher volume or
higher pitch = higher energy.
Picture/Symbol:
4) CHEMICAL ENERGY (POTENTIAL)
Definition: Energy stored in the chemical
compounds (bonds) of food & fuel.
Examples: Fossil Fuels (Oil, Gas, & Coal) Wood,
food, batteries etc.
Info: One of our most abundant and important
sources of energy! Released during chemical
reactions or burning.
Pic/Symbol:
5) ELECTRICAL ENERGY (KIN./POT.)
Definition: The energy of moving electrons.
Examples: Power plant, batteries, TV, static,
current, etc.
Interesting Information: Static Electricity- a
build up of charge, not moving. Current
electricity- a flow of electrons from –ve to
+ve.
Picture/Symbol:
6) NUCLEAR ENERGY (POTENTIAL)
Definition: Uses atomic reactions to produce
heat, radiation, electricity and light, from the
nucleus of an atom.
Examples:
Fission (split) in nuclear power plants and
fusion (fuse) of radioactive nuclei on the sun.
Info: A lot of energy from a little bit of
matter. E=mc 2
Picture/Symbol:
7) MECHANICAL ENERGY
(POT. & KIN.)
Definition:The energy of an object that is due
to its position (potential) or motion (kinetic) .
Examples: Roller coaster, car, walking,
blinking, breathing, wind, ocean
Interesting Information: ME
Total ME= PE + KE
Picture/Symbol:
4/21
MECHANICAL- POTENTIAL AND
KINETIC ENERGY
Identify all forms of energy present in this picture:
Energy forms brainpop
7A) POTENTIAL ENERGY
•Potential energy is stored energy
•Energy of position with the potential to
move. Ex) Standing on a diving board, a
stretched rubberband.
GPE = mgh or
weight (mg) x height(Joules)
Highest at highest height.
Higher with higher
Mass.
7B) KINETIC ENERGY
Kinetic energy is the energy of motion.
Highest at bottom of hill.
Any object that is moving has kinetic
energy.
Ex) Ball Moving, Wind, Sound, skier going
downhill.
7B) KINETIC ENERGY EQUATION
m = mass (in kg), v = velocity (in m/s), and KE
= kinetic energy (in J = joules).
There is a direct relationship between KE and
mass and between KE and v squared.
 Therefore as MASS INCREASES, KE
INCREASES. And as SPEED INCREASES, KE
INCREASES.
KE= ½ mv 2 (Joules)
There is an inverse relationship between
potential and kinetic energy
As an object goes up, its PE increases,
KE decreases, and as it goes down its PE
decreases, KE increases.
Total ME stays same.
Pendulum
ENERGY DURING DOWNHILL SKIING
 http://www.physicsclassroom.com/mmedia/energy/se.html
P. 64
1. What is the GPE of a 1kg ball at a
height of 10m? (g= 10m/s 2)
2. What is the total ME of a ball with
PE= 20 J
and KE = 10 J?
Study Jams Matter and Energy
P. 60 4/20 FORMS OF ENERGY FOLDABLE
IQ: Decide which of the following contain energy:
- A donut
- Charcoal
- A plant
- A car parked at the top of a hill
- A radio playing music
OQ: Identify the main type of energy represented by the
following:
a. An infrared lamp in a restaurant keeps food warm
________
b. a student listens to an Ipod
___________________________
c. A student picks up his backpack
________________________
d. A backpack that is on a students’
shoulders_______________
d. A hamburger is eaten at lunch _______________
e. Reactions on the sun that produce heat and light
__________
P. 60 4/20 FORMS OF ENERGY FOLDABLE
IQ: Decide which of the following contain energy:
- A donut
- Charcoal
- A plant
- A car parked at the top of a hill
- A radio playing music
OQ: Identify the main type of energy represented by the
following:
a. An infrared lamp in a restaurant keeps food warm
________
b. a student listens to an Ipod
___________________________
c. A student picks up his backpack
________________________
d. A backpack that is on a students’
shoulders_______________
d. A hamburger is eaten at lunch _______________
e. Reactions on the sun that produce heat and light
__________