1. Forms of Energy Add these notes to your graphic organizer.
Refer to textbook chapter 9, section 1 for additional information

2. What do we need to know?
S8P2. Students will be familiar with the forms and transformations of energy.
a. Explain energy transformation in terms of the Law of Conservation of Energy.

3. The law of conservation of energy states that:
Energy is never destroyed
Energy is never created
Energy may be transformed or converted from one form to another
Energy is constantly changing forms

4. b. Explain the relationship between potential and kinetic energy.
What ELSE do we
need to know?
b. Explain the relationship between potential and kinetic energy.
How about a little music?

5. kinetic energy
potential energy

6. potential energy
kinetic energy

7. kinetic energy
potential energy

8. Kinetic energy
Potential energy

9. Kinetic Energy
Energy of motion
Depends on
speed
mass
More speed = more KE
More mass = more KE

10. Potential Energy—Stored energy Energy of position, shape, or condition
More weight = more PE
More height = more PE
girl on a swing
pendulum

11. Potential energy is found in objects that want to bounce back into their natural shape when they are stretched, squished, or turned.
sling shot

12. c. Compare and contrast the different forms of energy (heat, light, electricity, mechanical motion, sound) and their characteristics.
Forms of Energy include:

13. Mechanical (Motion) Energy—total of potential and kinetic energy
energy caused by objects that are moving

14. Greatest potential energy at top (slowest/stopped)
Greatest kinetic energy at the bottom while going the fastest

15. Michael Davis at Ford's Theater
Watch the juggler
Michael Davis at Ford's Theater
This theater is in Washington, D.C.
President Abraham Lincoln was assassinated
while watching a show from one of the upper
balcony seats in this very same theater.
President Ronald Reagan and his wife are
enjoying this show.

16. Thermal energy (heat)—the total motion of the atoms and molecules within a substance
ex. Atoms move faster in hot water than ice
Hot water-faster
Ice-slower

17. Gravitational potential energy—energy stored because of where it is placed (higher = more PE)
(Depends on weight and height)

18. Chemical energy —energy stored in the bonds of atoms and molecules (released during chemical changes)

19. Electrical energy—energy of moving electrons

20. Sound energy—energy caused by an object’s vibrations (It travels in waves but cannot move through empty space.)

21. Radiant energy (light)—produced by the vibrations of electrically charged particles that travel in waves. Can travel through a vacuum (empty space)
ex. Sunlight, X-rays, lamps, see p.636

22. Nuclear energy—stored energy that comes from the nucleus of an atom.
Released when atoms are split apart (fission) or joined together (fusion)
ex. nuclear
power
plants

23. Now you’ve got them all.
Study them tonight!

24. Resource websites: