1. Energy Transformations
What do these two photos have in common? (Hint: Think energy)
Energy Transformations

2. Energy Energy – the ability to do work
Can cause change in temperature, speed, shape or direction of an object
Potential Energy – stored energy that can be converted to other forms of energy
Kinetic Energy – energy of movement

3. 9 Different types of energy
Mechanical
Thermal
Sound
Electrical
Radiant
Chemical
Nuclear
Gravitation
Elastic

5. Let’s Take a Moment
In the morning your wake up and turn the light switch, this converts ________ energy to ________energy. After you eat breakfast, your body turns _________ energy into _________ energy while you walk to school.

6. Many Forms of Energy
The sun (solar energy) is used by plants to produce sugar (glucose)
A campfire produces thermal energy (heat)
Some homes convert solar energy into electrical energy
Wind energy gets converted to electricity
Geothermal energy heats hot springs

7. Website
Go to the website and complete the worksheet called “Skate Park Energy”
Once done with the skate park, you will complete the definitions. Show Mr. James when you are done for the next activity!

8. Energy Conversions
In order to do work, energy constantly changes from one form to another
Energy in = input energy
The system where the energy is changed is called a converter
Energy out = output energy

9. Example of Energy Conversion

11. Can you think of a time when thermal energy is wasted?
During physical activity
Running an engine
Drill press (what happens if there is too much!?)

12. Conservation of Energy
What types of energy are produced by a blow dryer?
Conservation of Energy

13. Blow Dryer Electricity get converted to thermal
Thermal energy provides the heat to dry your hair
Kinetic energy in moving the air particles
Some electricity is converted to sound energy
Glowing element is light energy
Fan is run by a motor, but motor has friction (unused heat to dry hair)

14. Remember, the Law of Conservation of Mass states…
In a chemical reaction, mass cannot be created or destroyed, it simply changes forms
Therefore, the Law of Conservation of Energy must be…
Energy cannot be created or destroyed it simply changes from one form of energy to another

15. Energy Conversion Systems
A car engine converts about 1/3 of the energy input to useful energy output
Therefore,
Energy in = energy out OR
Energy in = Useful energy out + waste energy out

16. Review
Page 83 # 1-2
Page 85 # 1-3
Page 91 #1-3