1. Mav Mark List several ways YOU use energy.

2. Mav Mark What is the difference between potential and kinetic energy. Give examples of each.

3. Mav Mark Name 6 forms of Energy and give an example of each.

4. Mav Mark Name three ways heat is transferred Give an example of each.

5. Mav Mark What is the difference between an insulator and a conductor? Give examples…

6. Energy

7. 1. Energy The ability to do work or cause change is called energy.

8. 1. Energy When an object does work on another object, energy is transferred to that object Power is the rate at which the work is done.

9. 2. Types of Energy There are two basic kinds of energy: – Kinetic Energy – Potential Energy

10. 3. Kinetic The energy of motion is called kinetic energy (kineos = moving) Ex: running, blowing, rolling, sliding

11. 4. Potential Stored energy, based on the position or mass of an object is called potential energy. Potential Energy Depends on – Position – Mass of object Ex: sitting on a shelf / sitting on the floor small car sitting on a hill large car sitting on a hill

12. 5. Types of Potential Energy Gravitational Potential Energy is energy related to an objects height. Ex: a skier on a 100 ft. slope has more potential energy than a skier on a 70 ft. slope

13. 5. Types of Potential Energy Elastic Potential Energy is energy gained from being stretched Ex: sling shot, bow and arrow

14. Forms of Energy

15. 1. Mechanical Energy associated with the position and motion of an object (working energy) Mechanical energy = PE + KE Ex: a football being thrown by Drew Brees vs. being thrown by a 4 year old boy (size of ball, strength of player)

16. 2. Thermal Particles in motion generate heat – which is measured by thermal energy Ex: fast moving particles – high heat slow moving particles – less heat fire, lava, warm air, sunlight

17. 3. Electric Energy from electric charges – or the movement of electrons Ex: electricity in your home lightning batteries

18. 4. Chemical Energy that comes from breaking and forming chemical bonds Ex: fizzing caused by baking soda and vinegar glow sticks producing light food

19. 5. Nuclear Potential energy that is stored in an atom and released in a nuclear reaction Ex: electricity from nuclear power plant nuclear fission

20. 6. Electromagnetic Energy that travels in waves Ex: microwaves sunlight xrays radio waves sound

21. Energy Transformations and Conversions

22. 1. Energy Transformations Most forms of energy can be transformed into other forms. This is called an energy transformation. Two types of energy transformations are: – Single transformations – Multiple transformations

23. 2. Single Transformations In a single transformation, one form of energy is transferred into another. Examples: – Toasters transform electrical to thermal – Cell phones transform electrical to electromagnetic – Your body transforms chemical to mechanical

24. 3. Multiple Transformations Multiple transformations occur when a series of energy transformations occur. Example – Striking a Match: – Mechanical to strike it – Thermal energy releases stored chemical energy – Electromagnetic energy in the form of light

25. 4. Conservation of Energy The law of conservation of energy states that energy can not be created or destroyed.