1. Energy Types and Transformations

2. Energy
The ability to cause change

3. All forms of energy can be described in terms of two general types: 1
All forms of energy can be described in terms of two general types: Kinetic Energy 2. Potential Energy

4. Kinetic – the energy of motion Example: car moving

5. Potential – stored energy that can be used at a later time Example: holding a soccer ball in your hands

6. Energy Types
Chemical
Mechanical
Electrical
Thermal (heat)

7. 1. Chemical Energy
Specific arrangement of chemicals

8. Examples of chemical energy
If you strike the wood end of a match, nothing happens. If you strike the tip with the chemicals, the match will light.

9. Examples of chemical energy
Hand warmers
Glow sticks
Injury packs
Batteries

10. 2. Mechanical Energy
Energy of an object that is moving

11. Examples of mechanical energy
Gears
Windmills
Riding a bike
Juggling
Turbines

12. 3. Electrical Energy
Energy of moving electrons

13. Examples of electrical energy
Curling iron
Toaster
DVD player
Refrigerator

14. 4.Thermal (heat) Energy Movement of molecules to create heat
Energy flows from warmer to cooler objects.

15. Thermal (heat) Energy
Conduction
Convection
Radiation

16. Conduction
Transfer of energy through direct contact

17. Examples of conduction
Burning your hand on the hot stove
Pancake on the griddle
Burning your feet on the pavement on a hot summer day

18. Convection
Movement that transfers heat in a liquid or gas (circular)

19. Examples of convection
Heating your house
Cooking soup
Lava lamp

20. Radiation
Transfer of energy by light

21. Examples of radiation
Sunbathing
Heat from a bonfire
Tanning booth

22. Law of Conservation
Energy can neither be created or destroyed