Energy can exist in many forms and can be transferred from one form to another. The document discusses various types of energy including mechanical, thermal, chemical, electrical, electromagnetic, and nuclear energy. It provides definitions and examples of each type of energy. Key points include that energy has the ability to cause change or do work, and it can be measured and calculated using specific formulas for gravitational potential, kinetic, and other forms of energy.

1. Energy
The forms and Nature of…

2. What is Energy?
The Ability to do work or cause
change.
Produce warmth
Produce Light
Produce Sound
Produce Movement
Produce Growth
Powers Technology

3. Nature of Energy
• Energy is all around you.
• You hear energy as sound, you see
energy as light,
• you can feel energy in wind.
• Living organisms need energy for
growth
• and movement.
• You use energy when you hit a tennis
ball,
• compress a spring, or lift a grocery bag.
• Energy is the ability to do work

4. States or Classes of Energy
Potential Kinetic
Stored energy
or energy of position
Gravitational,
stored mechanical,
Nuclear, chemical
Energy of Motion
Motion, Electrical,
Sound, Radiant,
Thermal

5. What is Potential Energy?
oEnergy that is stored
and waiting to be
used later

6. What is Gravitational Potential Energy?
o Potential energy
due to an object’s
position
o P.E. = mass x
height x gravity
Don’t look down,
Rover!
Good boy!

7. Changes in gravitational potential energy
For an object in Earth’s gravitational field:
If an object falls will it gain
or lose gravitational
potential energy?
If an object moves up will it
gain or lose gravitational
potential energy?

8. GPE=Wh
We can calculate the change in gravitational potential energy (GPE) for
a moving object using the formula below:
Change in GPE = Weight x Change in height
GPE=Wh
GPE measured in Joules (J)
Weight measured in Newtons (N)
Height measured in Metres (m)

9. Potential Energy
•Stored Mechanical
•Chemical
•Nuclear Energy

10. What is Kinetic Energy?
o Energy an object has due
to its motion
o K.E. = .5(mass x speed2
)

11. KE=½m(v)²
We can calculate the kinetic energy (KE) for a moving object
using the formula below:
Kinetic Energy = ½x mass x(velocity)2
KE=½mv2
KE measured in Joules (J)
Mass measured in Kilograms (Kg)
Velocity measured in Metres per second (ms)

12. Forms of Energy
•Mechanical
•Thermal
•Chemical
Electrical
Electromagnetic
Nuclear
Energy can be
transferred, or
converted, from
one form to
another!

13. What is Mechanical Energy?
o Energy due to an
object’s motion (kinetic)
or position (potential).
The bowling ball has
mechanical energy.
When the ball strikes
the pins, mechanical
energy is transferred to
the pins!

14. Mechanical Energy
•Energy of motion
or position
•Sound, wind,
waterfall,
compressed
spring
•KE or PE
•Not 100% efficient
much lost to heat

15. Examples of Mechanical Energy

16. What is Electromagnetic
Energy?
o Light energy
o Includes energy from
gamma rays, xrays,
ultraviolet rays, visible
light, infrared rays,
microwave and radio
bands

17. Electromagnetic Energy
•Light is a form of
electromagnetic energy.
•Each color of light (Roy G
Bv) represents a different
amount of electromagnetic
energy.
•energy that travels in
waves; have electrical
and magnetic properties
•Electromagnetic Energy is
also carried by X-rays, radio
waves, and laser light.

18. What is Electrical Energy?
o Energy caused by
the movement of
electrons
o Easily transported
through power lines
and converted into
other forms of energy

19. Electrical Energy
•Moving electrical charges that
produce electricity and energy.
Static Shock
Lightening
Computers/TVs/
Radios
Lights
 from batteries, power lines,
lightning

20. What is Chemical Energy?
o Energy that is
available for release
from chemical
reactions.
The chemical bonds in
a matchstick store
energy that is
transformed into
thermal energy when
the match is struck.

21. Chemical Energy
•Energy stored by
chemical bonds in an
object.
•When bonds are
broken energy is
released.
•PE only
•gasoline, food, coal,
wood

22. Examples of Chemical Energy

23. Heat/Thermal Energy
•The internal motion of
an objects atoms and
molecules.
•Measured by
temperature.
•The faster particles
move, the more
thermal energy they
have.
•KE only

24. 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.
A cooler object's molecules and
atoms will show less movement.

25. 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
temperature and phase of any form
of matter.

26. Nuclear Power
• Energy stored in the nucleus of
an atom RELEASED by fission
or fusion
Sun
Stars
Nuclear
Power Plant

27. Nuclear Energy
•Energy stored in
center(nucleus) of an
atom
•Fission (breaking apart)
•Fusion (forming)
•The sun
•Most powerful
•The nucleus of an atom
is the source of nuclear
energy.
•PE only

28. 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?
MECHANICAL ENERGY

29. 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

30. QUIZ TIME!
What energy transformation
occurs when an electric lamp is
turned on?
ELECTRICAL ENERGY
↓
ELECTROMAGNETIC ENERGY

31. What types of energy are shown below?
Mechanical and Thermal Energy

32. What type of energy is shown below?
Chemical Energy

33. What types of energy are shown below?
Electrical, Mechanical and
Electromagnetic Energy

34. What type of energy is shown below?
Chemical Energy (yummy)

35. What type of energy is shown below?
Thermal Energy

36. • Draw a flow map showing the flow of
energy transformations in a SYSTEM
from starting vehicle to driving. You
should have 5 different types of energy.

37. Energy Transfer
Chemical
Electrical
Electrical
Electrical
Sound
(mechanical)
Light
(Electromagnetic)
Thermal
Mechanical