Bellringer **5 minutes
1.
What does the Law of Conservation of
Energy state?
2.
What is energy?
3.
List at least 4 types of energy?
4.What is a mechanical energy?
Pop Quiz **15 minutes
1. What does the Law of Conservation of Energy
state?
2. What is energy?
3. List the main types of energy? Define at least
4 of them.
4. Define potential energy. Give an example
5. Define kinetic energy. Give an example.
6. What is electromagnetic energy? Give an
example of two types.
Review Game: Taboo
**12 minutes
Rules:
Must remain at a level 2 and
below
May not have the same team
member go twice
Cannot say any words below
the line
Cannot draw
You cannot say any words in
the actual word
(Atomic Bomb/ cannot use
Energy:
Energy:
Forms and
Forms and
Changes
Nature of Energy
Energy is all around you!
You can hear energy as sound.
You can see energy as light.
Nature of Energy
You use energy
when you:
hit a softball. lift your book
bag.
compress a
Nature of Energy
Living organisms need
energy for growth and
Nature of Energy
Energy is involved when:
a bird flies.
a bomb explodes. rain falls from the
sky.
electricity flows in
Nature of Energy
What is energy that it can be
involved in so many different
activities?
Energy can be defined as the
ability to do work.
If an object or organism does
work (exerts a force over a
Nature of Energy
Because of the direct connection
between energy and work,
energy is measured in the same
unit as work: joules (J).
In addition to using energy to do
work, objects gain energy
In-class activity **25 minutes
Earth: Power Planet Assignment
-Complete a mini booklet which summarizes what is
discussed in class using class notes and the textbook.
-On page 1, glue or double-side tape the half sheet rubric
onto the front cover.
-Number all pages in the book
-Each day we go through information, at the last portion
of class you will be given time to work on your Power Planet book.
What is the
Law of
The Law of Conservation of Energy
Energy can be neither created nor
destroyed by ordinary means.
It can only be converted from one form
to another.
If energy seems to disappear, then
Law of Conservation of Energy
In 1905, Albert Einstein said that
mass and energy can be converted
into each other.
He showed that if matter is
destroyed, energy is created, and if
energy is destroyed mass is
created.
2Law of Conservation of Energy
Law of Conservation of Energy states:
Energy can neither
be created nor
destroyed, just
transformed from one
form into another.
Energy: The ability to cause change
Remember MRS CHEN !!
Mechanical energy
Radiant energy (Solar energy) Sound energy
Chemical energy
Heat Energy (Thermal) Electrical Energy
Nuclear Energy
What is the source of our energy?
Forms of Energy
The main forms of energy are:
Mechanical energy
Radiant energy (Solar energy) Sound energy
Chemical energy
Heat Energy (Thermal) Electrical Energy
Mechanical Energy
When work is done to an
object, it acquires energy.
The energy it acquires is
What is Mechanical
Energy?
o
Energy due to a object
’
s motion (kinetic) or
position (potential).
The bowling ball has
mechanical energy.
When the ball strikes
the pins, mechanical
energy is transferred
Mechanical Energy
When you
kick a
football, you
give
mechancal
energy to the
football to
Mechanical Energy
When you throw a bowling ball, you give it energy.
When that bowling ball hits the pins, some of the
energy is
Potential Kinetic
energy of
position or
energy in
storage.
Water behind a
dam
Hammer over head Food on the plate
energy of
motion, the form
capable of doing
work
Flowing water
A falling hammer Electrons
Radiant/Electromagnetic Energy
Power lines carry electromagnetic
Electromagnetic Energy?
o
Light energy
o
Includes energy
from gamma rays,
xrays, ultraviolet
rays, visible light,
infrared rays,
microwave and
Electromagnetic Energy
Light is a form of
electromagnetic energy. Each color of light (Roy G
Bv) represents a different amount of
electromagnetic energy. Electromagnetic Energy is
Electromagnetic Energy
Radio waves
Include microwaves, tv and radio
longest wavelengths and lowest frequencies of all
electromagnetic waves & the least amount of energy.
Visible Light
Waves in the middle section of the electromagnetic spectrum
are called light.
X rays and gamma rays
Includes
shortest wavelengths and highest frequencies of all
electromagnetic waves & the greatest amount of energy.
Between these two extremes, wavelength, frequency,
QUIZ TIME!
What type of energy
cooks food in a
microwave oven?
What type of energy is
the spinning plate
QUIZ TIME!
What type of energy cooks
food in a microwave
oven?
ELECTROMAGNETIC
ENERGY
What type of energy is the
spinning plate inside of a
microwave oven?
What is Thermal Energy?
o
Heat energy
o
The heat energy of an
object determines how
active its atoms are.
A hot object is one whose atoms and molecules are excited and show rapid
movement.
Thermal/Heat Energy
The internal motion of the atoms is
called heat energy, because moving
particles produce heat.
Heat energy can be produced by
friction.
Heat energy causes changes in
Chemical Energy?
o
Energy that is
available for release
from chemical
reactions.
The chemical bonds
in a matchstick store
energy that is
transformed into
Chemical Energy
Chemical Energy is required to
bond atoms together.
And when bonds are broken,
Chemical Energy
Fuel and food
are forms of
stored
What is Electrical Energy?
o
Energy caused by
the movement of
electrons
o
Easily transported
through power
lines and
converted into
other forms of
Nuclear Energy
The nucleus
of an atom is
the source of
nuclear
Nuclear Energy
When the nucleus splits (fission),
nuclear energy is released in the
form of heat energy and light
energy.
Nuclear energy is also released
Nuclear Energy
The sun’s energy
is produced from a nuclear fusion reaction in which hydrogen nuclei fuse to form
Nuclear Energy
Nuclear
energy is the
most
concentrated
form of
energy.
States of Energy
The most common energy
conversion is the conversion
between potential and kinetic
energy.
All forms of energy can be in either
of two states:
States of Energy:
Kinetic and Potential Energy
Kinetic Energy is the
energy of motion.
Potential Energy is
Kinetic Energy
The energy of motion is called
kinetic energy.
The faster an object moves, the
more kinetic energy it has.
The greater the mass of a moving
object, the more kinetic energy it
has.
Kinetic energy depends on both
Kinetic Energy
Potential Energy
Potential Energy is stored energy.
Stored chemically in fuel, the nucleus
of atom, and in foods.
Or stored because of the work done on
it:
Stretching a rubber band. Winding a watch.
Potential Energy
Gravitational Potential Energy
Potential energy that is dependent on height is called gravitational
Potential Energy
Gravitational Potential Energy
Gravitational Potential Energy
If you stand on a 3-meter diving
board, you have 3 times the G.P.E, than you had on a 1-meter diving
Gravitational Potential Energy
“
The bigger they are the harder
they fall
”
is not just a saying. It
’
s
true. Objects with more mass have
greater G.P.E.
The formula to find G.P.E. is
Kinetic-Potential Energy Conversion
Roller coasters work because of the energy that is built into the system. Initially, the cars are pulled mechanically up the tallest hill, giving them a great deal of potential energy. From that point, the
Kinetic vs. Potential Energy
Kinetic-Potential Energy Conversions
Energy Conversion
Energy can be changed from one
Energy conversions
All forms of energy can be
converted into other forms.
The sun’s energy through solar cells
can be converted directly into electricity.
Green plants convert the sun’s energy
Other energy conversions
In an electric motor, electromagnetic
energy is converted to mechanical energy.
In a battery, chemical energy is
converted into electromagnetic energy.
The mechanical energy of a waterfall is
Energy Conversions
In an automobile engine, fuel is
burned to convert chemical energy into heat energy. The heat energy is then changed into mechanical
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?
QUIZ TIME!
What energy transformation
occurs when an electric
lamp is turned on?
ELECTRICAL ENERGY
What types of energy are
shown below?
What type of energy is shown
below?
What types of energy are
shown below?
What type of energy is shown
below?
What type of energy is shown
below?
What types of energy are
shown below?
Mechanical, Electromagnetic,
Electrical, Chemical and
The Law of Conservation of
Energy
Energy cannot be created or
destroyed; it may be
transformed from one form
into another, but the total
Vocabulary Words
energy mechanical energy heat energy chemical energy electromagnetic energy nuclear energy kinetic energy potential energygravitational potential energy energy conversion
