Energy exists in many forms and can be transferred and transformed, but not created or destroyed. The document outlines six main forms of energy: mechanical, chemical, electrical, heat/thermal, light/radiant, and nuclear. It provides examples of each type of energy and explains concepts like potential and kinetic energy. Potential energy is stored energy in an object at rest, while kinetic energy is energy in motion.

1. ENERGY : Types and
Forms

2. Energy
- is the ability to do work.

3. Characteristics of Energy
4 Energy exists in many forms.
4 Energy can be moved from one
object to another.
4 Energy can be changed from one
form to another.
4 Energy cannot be created or
destroyed.

4. What is Always Present, But Never
Visible?
Although energy isn’t visible,
you can detect evidence of energy.
ENERGY

5. Types of Energy
• Potential Energy
• Kinetic Energy

6. Potential Energy
The energy that is stored in an object at rest.

7. Kinetic Energy
- is energy in motion

8. Six Forms of Energy
Mechanical Chemical Electrical
Heat/Thermal Light/Radiant
Nuclear

9. Mechanical Energy
• Energy possessed by an
object due to its motion or
its stored energy.
• You use mechanical
energy when you kick a
ball or turn the pedals of a
bicycle
• Other examples include
water flowing in a stream,
tires rolling down a road
and sound waves from
your iPod.

10. Chemical Energy
• energy stored in
molecules
• Energy released by a
chemical reaction
• The food you eat contains
chemical energy that is
released when you digest
your meal
• Wood, coal, gasoline, and
natural gas are fuels that
contain chemical energy

11. Electrical Energy
• Energy that comes from
the electrons within atoms
• It is the flow of charged
particles, called electrons.
• Lightning and static
electricity are also forms of
electrical energy

12. Heat (Thermal) Energy
• Energy created by
the motion of
atoms and
molecules
• Thermal energy
exists when you
heat a pot of water
on a stove

13. Nuclear Energy
• Energy contained in the
nucleus of an atom
• Nuclear energy is
released in the splitting
(Nuclear fission) or
joining (Nuclear fusion)
of the nuclei of atoms.

14. Light (Radiant) Energy
• Energy that can move through
an empty space
• The sun and stars are
powerful sources of radiant
energy
• The light given off by light
bulbs and campfires,
ultraviolet rays, x-rays, infrared
rays, radio waves, microwaves
and radar waves are some
examples.

15. Sound Energy
• Produced by vibration of objects

17. Seatwork:
1. All potential energy can be changed to
__.
A. kinetic energy C. wave energy
B. water energy D. wind energy
2. What energy is created by the motion of
atoms and molecules?
A.Thermal energy C. Light/Radiant Energy
B.Mechanical Energy D. Chemical Energy

18. 3. Which energy can travel through an
empty space?
A. Thermal energy C. Light/Radiant Energy
B. Mechanical Energy D. Chemical Energy
4. What form of energy is stored in the leaves of
plants?
A. heat energy C. chemical energy
B. light energy D. mechanical energy
5. A boy threw a ball over the fence. What energy
did the moving ball have?
A. heat energy C. chemical energy
B. light energy D. mechanical energy

19. Energy Forms
• These forms of energy do work that end
up as motion, light, or heat.
• Energy is used to power manufacturing,
light buildings, propel vehicles, and
communicate messages.
What else do we use energy for?

20. Energy Conversion
All forms of energy can be
converted into other forms
of energy

21. Law of Conservation of Energy
With every transformation, some energy
is converted to less useful forms. Energy
conversions are not 100% efficient. The
energy output for the intended purpose is
seldom the same as the energy we put in.
100 J electricity in
95 J heat out
5 J light out

22. Image Resources
Microsoft, Inc. (2009). Clip Art. Retrieved March 24, 2009, from
http://office.microsoft.com/en-us/clipart/default.aspx
ETH – Renewable Energy Carriers (2010). Professorship of Renewable
Energy Carriers. Retrieved May 5, 2010, from
http://www.pre.ethz.ch/research/projects/?id=solarfuels