Transcript Unit 3: Energy

S8P2. Students will be familiar with the forms and
transformations of energy.
Unit 3: Energy
S8P2. Students will be familiar with the
forms and transformations of energy.
EQ: What is energy?
Answer EQ:
P. 70
Learning Goals
Choose only 1

LG1: I will know the different forms of energy;
understand law of conservation of energy, and the
difference between potential and kinetic energy.

LG2: I will know and label the different forms of
energy; understand law of conservation of energy,
and compare and contrast potential and kinetic
energy.

LG3: I will know and label the different forms of
energy; understand law of conservation of energy in
everyday life, and compare and contrast potential
and kinetic energy.

The Law of Conservation of Energy –
Energy cannot be created or destroyed,
but may change form.

Energy – the ability to cause change
Forms of energy include:
-Electrical
-Chemical
-Thermal
-Mechanical

The joule is the unit of energy. Work can
be thought of as the transfer of energy.
 Joule is the measurement of energy.

Energy transformation – the process
that occurs when one kind of energy
changes to another kind of energy
 Ex. Chemical to Thermal happening in our
bodies when we burn calories.
Potential and Kinetic Energy
EQ: What is potential and kinetic energy?
EQ Answer:
P. 72
Kinetic Energy – energy in the form of
motion
Ex. Going down a slide
Potential Energy – energy that is stored
Ex. Waiting at the top of a slide
P. 74

Answer these questions around the TV.
Explain what your comic strip shows.
 What is the potential energy picture and
why is it potential energy?
 What is the kinetic energy picture and
why is it kinetic energy?


Elastic Potential Energy – energy stored
by something that can stretch or
compress, such as rubber band or
spring.
P. 73

Chemical Potential Energy – energy
stored in chemical bonds
 A glass of milk has CPE until you drink it
then calories are used as energy for your
body.

Gravitational Potential Energy –
anything that can fall has stored GPE
 A ball on a ledge has GPE

Nuclear Energy – energy stored in the
nucleus of an atom. It is the energy that
holds the nucleus together.
Cut out your pictures!

Work with your partner to match the
word to the picture.
Foldable
Kinetic Energy

Energy in the form of motion

*ANYTHING THAT IS MOVING!
Potential Energy

Stored energy

*NOT MOVING!
Elastic Potential Energy

Energy stored by something that can
stretch or compress
Chemical Potential Energy

Energy stored in chemical bonds

*ALL FOOD
Gravitational Potential Energy

Energy stored in an object that can fall
Forms of Energy
EQ: What are 4 forms of energy?
EQ Answer:
P. 76
Sound Energy – form of energy we can
hear
Light Energy – form of energy our eyes
can detect
Thermal Energy – energy of moving
particles that cause heat
Mechanical Energy – energy of objects in
motion
Electrical Energy – energy of particles
moving through wire (usually electrons)
Magnetic Energy – energy causing push or
pull
Foldable
Outside on tab:
Sound Energy:
What we can hear
Inside the tab:
Example: The sound you
hear when you bounce
a ball
Outside the tab:
Light Energy:
What we can see
Inside the tab:
Example: Light we see in a
room, the sun is a great
source of light in the day
Outside the tab:
Thermal Energy:
Heat we can feel
Inside the tab:
Examples: Warmth from the
sun in the day or a campfire
at night.
Outside the tab:
Mechanical Energy:
Anything that moves
Example: a car moving,
a person catching a
ball, a ball moving in
the air.
Inside the tab:
Outside the tab:
Electrical Energy:
Electrons moving through
wire
Inside the tab:
Example: Plugging in a
lamp, lightning from the
sky, power in your house
Outside the tab:
Magnetic Energy:
Push or Pull
Example: the push or pull on
a magnet on a frig.
Inside the tab:
Mechanical Energy
EQ: What is the mechanical energy
formula?
EQ Answer:
P. 78
There are two forms of energy in
mechanical energy:
Kinetic Energy
Potential Energy
Mechanical Energy: The combination of an
object’s potential energy and kinetic
energy.
FORMULA:
ME = PE + KE
Mechanical Energy = Potential + Kinetic
Maximum
potential
energy
Maximum
potential
energy
Maximum
kinetic energy
Every time the object changes direction,
the object has more potential energy.
Use mechanical energy formula to find the missing piece!
1.
7 joules of kinetic and 5 joules of
potential.
2.
10 joules of potential and 3 joules of
kinetic.
3.
15 joules of mechanical and 6 joules of
potential.
Word Problems
1.
When Sally throws a ball in the air, she
notices that the ball has 5 joules of
potential energy and 7 joules of kinetic.
How much mechanical energy does the
ball have?
2. Jim is pushing a box on a truck. The full
mechanical energy of the box is 20
joules. Jim knows the box only has 6
joules of potential energy. How much
kinetic energy does the box have?
Create your own problem for mechanical
energy:
LG1: Ex. 3 PE + 5 KE = 8 ME
LG2: Ex. 10 joules of potential and 3 joules
of kinetic.
LG3: Create a word problem.
Thermal Energy
EQ: What is thermal energy?
EQ Answer:
P. 82

Temperature – a measure of the
average value of the kinetic energy of
the molecules in random motion .

Thermal Expansion – almost all
substances expand when they are
heated and contract when they are
cooled – exception is water.
 Heated  Expand
 Cooled  Contract

Thermal Energy – sum of the kinetic and
potential energy of all the particles in an
object.
 Thermal energy increases as temperature
increases
Thermal Energy Lab
Good Afternoon!

Come on in and you have 5 minutes to
study for your quiz.
 P. 70-83
Quiz
Word Bank:
Mechanical Energy
Thermal Energy
Gravitational Potential Energy
Sound Energy
Elastic Potential Energy
Light Energy
Energy Transformations
Transferring Thermal Energy
EQ: What is convection, radiation, and
conduction?
EQ Answer:
P. 84
Thermal energy is transferred from place
to place by:
Conduction Convection Radiation
Transfer of
thermal
energy by
collisions
between
particles in
matter
Transfer of
thermal
energy in a
fluid by the
movement of
warmer and
cooler fluid
from place to
place
Transfer of
energy by
electromagn
etic waves

Conduction occurs in solids, liquids, and
gases. Metals are the best conductors of
heat.

Insulator – material in which heat flows
slowly.

Examples of materials that are
insulators are wood, some plastics,
fiberglass, and air.

Convection occurs in fluids and gases.
Rising of warmer fluid/gas and sinking of
cooler fluid/gas forms a convection
current.

Radiation is the transfer of energy is
most important in gases.
Good Afternoon!

Come on in and cut out the pictures on
the handout.

While you are waiting on the scissors,
study yesterday’s notes.
Card Sort

I want you to sort out your cards into
three categories:
 Conduction
 Convection
 Radiation
When you are done, please raise your hand
so I can check.
On the back of the Cards…

Put a description why that picture shows
that type of heat transfer.

Ex.
 This is an example of conduction because
my hand is touching the hot cup of coffee.
Add your everyday examples
You will be handed three blank squares.
On each blank square, you will draw a
picture of each heat transfer in your life.
 ADD COLOR!
 If you need help, please let me know!

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1
3
Energy Project!!!!!

You are going to create a graffiti page in
your interactive notebook on page 87.

You will have to put certain words on
your page and add so many pictures.
LG1: You will draw 5 picture examples of
vocabulary
LG2: You will draw 6 picture examples of
vocabulary
LG3: You will draw 7 picture examples of
vocabulary
Words you will use on graffiti
page!
 Light energy






Energy
Energy
transformations
Elastic energy
Chemical energy
Gravitational energy
Sound energy






P. 87
Thermal energy
Mechanical energy
formula
Electrical energy
Convection
Conduction
Radiation
No white should be showing at all!!!!