Thursday- Science
Question of the Day
0607.10.3
Recognize that
energy can be
transformed
from one type to
another.
An automobile engine
converts the chemical
energy in gasoline mostly
into heat and A. nuclear energy.
B. light energy.
C. electromagnetic energy.
D. mechanical energy.
Going Over the Question of the Day
An automobile engine
converts the chemical
energy in gasoline
mostly into heat and –
A. nuclear energy
B. light energy
C. electromagnetic
energy
D. mechanical energy.
Testing Tips:
• When thinking about energy
transformations from our second unit, it
is important to visualize the object and
ask some important questions about it:
• What is the source of energy of this
object? The source of energy of an
automobile is gasoline – which has
chemical energy
• What is the purpose of the object?
The purpose of an automobile is to
move!
• Does any other form of energy get
produced also? Remember, the most
common form of energy that is
produced is heat (thermal energy)!
• Because the purpose of an
automobile is to move, the following
energy transformation takes place:
Chemical energy → thermal energy
(heat) & mechanical energy
th
6 Grade Science TCAP:
Reviewing Energy Transformations!
(from Unit 2: Energy)
Today’s Agenda:
• Going over the Question of the Day (5 minutes)
o
o
Correct answer
Testing Tips
• Reviewing Energy Transformations (20 minutes)
o
o
Part I: Reviewing Forms of Energy
Part II: Reviewing Energy Transformations
• Energy Transformations Practice Quiz (15 minutes)
Key Concepts to remember about
Energy Transformations
• We learned about several forms of energy:
o
o
o
o
Potential Energy
Kinetic Energy
Mechanical Energy
Thermal Energy
- Light Energy
- Sound Energy
- Electrical Energy
- Nuclear Energy
• There are three forms of potential energy:
o
o
o
Gravitational Potential Energy
Elastic Potential Energy
Chemical Potential Energy
• The Law of Conservation of Energy states that
energy cannot be destroyed or created.
• Remember: Energy just changes from one form
to another!
Part I: Reviewing Forms of
Energy
Taking Notes for Part I:
Set up a table like the one below in your notebook and fill
it in as we go along!
Form of Energy
Definition
Example
(1) Kinetic Energy
(2) Gravitational Potential Energy
(3) Chemical Potential Energy
(4) Elastic Potential Energy
(5) Mechanical Energy
(6) Thermal Energy
(7) Electrical Energy
(8) Sound Energy
(9) Light Energy
(10) Nuclear Energy
Make sure you have at least 3 lines for each row in your table!
Kinetic Energy
• Is the energy of motion.
• Kinetic energy depends on mass and
speed.
• The faster something is moving, the more
kinetic energy it has.
• Also, the more mass a moving object has,
the greater its kinetic energy.
If a motorcycle and a
Hummer are both driving
down Winchester going 40
mph, which has the
greater kinetic energy?
The Hummer has a greater kinetic energy because it has a greater
mass!
Chemical Potential Energy
• Before you eat that sugary drink or
food, it has the potential to give you
energy.
• Food and drinks have chemical
potential energy due to their
chemical composition.
• Also, batteries and gasoline have
chemical potential energy.
Gravitational Potential Energy
• When you lift an object, you
do work on it.
• You use a force that is
against the force of gravity.
• Books on a shelf have
gravitational potential
energy.
Which has the greater gravitational potential
energy: the black vase on the 6th shelf or the
vase on the 3rd shelf?
The black vase has the greater gravitational
potential energy remember G.P.E. depends on
height and weight!
Elastic Potential Energy
• Energy can be
stored in
bowstrings,
springs, and rubber
bands.
• You change the
shape of these
objects by
stretching them.
Mechanical Energy
• The total energy
of motion and
position of an
object
Example of Mechanical
Energy
A spinning wheel.
Thermal Energy
• All of the kinetic
energy due to random
motion of the
particles that make up
an object.
• The hotter something
is, the more kinetic
energy its particles
have.
• If something is cold, like
ice, its particles are
moving very slow, or
have little kinetic
energy.
Example of Thermal Energy
Water has thermal
energy.
Electrical Energy
• The energy of
moving
electrons.
• A.k.a. electricity!
Example of Electrical Energy
• Anything that is
powered by electricity
requires electrical
energy!
Sound Energy
• An object’s
vibrations transmit
sound energy
through the air.
Example of Sound Energy
• Anything that
produces sound
is giving off
sound energy!
Light Energy
• Produced by
vibrations of
electrically charged
particles.
Example of Light Energy
• Anything that
produces a
form of light!
Nuclear Energy
• Energy that
comes from
changes in the
nucleus of an
atom.
The sun is a natural
example of nuclear
energy.
Humans have also figured
out a way to produce
electricity using nuclear
energy.
Part II: Energy Transformations
Energy just CHANGES!
• The Law of Conservation of Energy states
that energy cannot be destroyed or
created.
← Write this down
• When thinking about energy transformations
from our second unit, it is important to
visualize the object and ask some important
questions about it:
(1) What is the source of energy of this
object?
Write
(2) What is the purpose of the object? ←
this down
(3) Does any other form of energy get
produced also?
Looking at Real Examples of Energy Conversions:
BLOW DRYER
• What is the source of energy of this object?
A blow dryer is powered by electrical energy.
• What is the purpose of the object?
To dry your hair! * this is done through thermal energy
(heat)
• Does any other form of energy get produced also?
A blow dryer also produces sound energy and mechanical
energy (the motor spins to blow air out of the blow dryer)
• What energy conversions are taking place here?
_________
energy → _________
energy
Electrical
Thermal
Electrical energy →_________
Sound
_________
energy
Electrical energy → _________
Mechanica energy
_________
Looking at Real Examples of Energy Conversions:
MATCH BEING LIT
• What is the source of energy of this object?
Your mechanical energy (moving arm) strikes the match against the
box.
Also, the chemical energy in the red tip of a match is what sparks the
flame.
• What is the purpose of the object?
To create fire, which gives off heat (thermal energy) and light!
• Does any other form of energy get produced also?
When a match is struck, you can hear it (sound energy)
• What energy conversions are taking place here?
Mechanical energy → _________
Thermal
_________
energy
Chemical energy → _________
Light
_________
energy
Mechanical
Sound
_________ energy → _________
energy
Looking at Real Examples of Energy Conversions:
FAN
• What is the source of energy of this object?
The source of energy for a fan is electrical energy
• What is the purpose of the object?
The purpose is to cool you off – the moving blades do this!
• Does any other form of energy get produced also?
A fan produces sound energy (the “bzz” of the moving
blades) and thermal energy (from the motor)
• What energy conversions are taking place here?
Electrical
_________
energy → Mechanical
_________ energy
Electrical
Sound
_________
energy → _________
energy
Electrical
Thermal
_________
energy → _________
energy
Looking at Real Examples of Energy Conversions:
Create Your Own!
• At the bottom of your notes today underneath
your steps for identifying Energy
Transformations, describe your own example of
an energy conversion that we have not yet
discussed.
• Then, take a few minutes to share your energy
conversion.
• Fellow scholars: if you think that a scholar has
missed or incorrectly identified an energy
conversion, raise your hand to respectfully
correct them and make you sure you explain!
Energy Transformations Practice
Quiz (15 minutes)
• On my Quia profile, open the “March Madness”
Folder and click on “Week 1 Practice Quiz”
• You will have the last portion of class to answer 10
practice questions on this topic.
The secret word for today’s practice quiz is:
“change”
• Once you submit your answers, make sure you
review the questions you got wrong!
• If you finish early with the quiz, you can view the
link on my Quia for “March Madness: Week 1”