1. Energy Transformations and Conservation

2. Review What are the 2 types of energy? What are the 6 forms of energy? 1 Form + 5 other forms. Why?

3. Overview Energy can be transformed from one form of energy into other forms. Conservation of energy/First Law of Thermodynamics. Energy and Matter. Source of all Energy.

4. Single Transformation Sometimes in order to do work one form of energy must be transformed into another. Ex. A toaster transforms electric energy into thermal energy. Ex. A cell phone transforms electric energy into electromagnetic energy to make a call. Ex. Your body transforms chemical energy in food into mechanical energy to move your muscles.

5. Multiple transformations Often times a series of energy transformations is needed to do work. Ex. Striking a match ME  Thermal  Releases Chemical  Thermal + Electromagnetic. Car Electrical  Thermal  Releases chemical  Thermal  ME + Electrical

6. Kinetic and Potential Transformations Energy is constantly changing from Kinetic to Potential and back to Kinetic. Ex. Ball bouncing Ex. Pendulum swinging

7. Conservation of Energy Energy cannot be created or destroyed. The energy is just transformed into other forms. Ex. Spinning ball/spinning top. Why does the ball or top stop spinning? Friction is the source of a lot of lost energy. It is not destroyed just converted into heat.

8. Energy and Matter What is conservation of Matter/Mass? Mass cannot be created or destroyed and neither can energy. Albert Einstein’s theory of relativity – E=mc 2 E = energy M= mass C = speed of light (constant does not change)

9. Energy and Matter What does it mean? A small amount of mass can be converted into a large amount of energy. This is how nuclear energy works.