1. Energy Transformations
Energy is continually changing from one form to another. These changes from one energy form to another are called transformations.

2. Tracking Energy Transformations Three energy transformations:

3. The Biker
Leg muscles transform Chemical energy into Kinetic – some of it is transferred to the bike
As he goes up the hill, some of this energy changes to potential
As his body gets warmer the chemical energy is turned into thermal
* Thermal energy is always one of the products of an energy transformation

4. Energy can neither be created nor destroyed – it can only be changed!
Law of Conservation of Energy
Energy can neither be created nor destroyed – it can only be changed!

5. Changing Kinetic & Potential
The tossed baseball example uses both kinetic and potential
The Mechanical Energy of an object is the SUM of the object’s potential and kinetic energy; so the mechanical energy of the ball remained constant as it rose into the and then fell back down
Friction can cause mechanical energy to decrease (ex. Sliding book)

6. Using Chemical Energy
Food
Muscle Use

7. Using Thermal Energy
All forms of energy can be transformed into thermal energy
Burns
Electric Wires
Heat buildings
Thermal energy will always move from a warmer material to a cooler one
Conduction, Convection and Radiation

8. Using Radient Energy
A sun tan- radient energy is from the Sun is transferred into chemical energy on your skin and you get darker
Visible light produces energy you can see
Radient can also be transferred into electrical (X-rays, gamma rays)

9. Using Electrical Energy
One of the most useful forms of energy
Electrical is converted into radient to provide us with light
Converted into thermal to heat up homes/buildings
Converted into kinetic to make electric motors move

10. Electrical Energy
A generator is a device that is used to convert kinetic energy into electrical energy
Burning fossil fuels produces thermal energy that is used to boil water and produce steam
In a power plant, steam is used to spin a turbine which then spins an electric generator

11. Organized and Disorganized Energy
Energy cannot be created nor destroyed – however the more we use it the less useful energy we have available
Useful energy that is organized and concentrated in a certain area does not spread out
Energy that is spread out, like waste thermal energy, is disorganized energy
The amount of disorganized energy in the universe is always increasing