1. Electricity – chapter 9,10,11 Electricity is the build up of charge electrons e- (static) or movement of charge (current), can be due to electrons e- or ions (charged particles)

2. The Nature of Static Electricity chapter 9

4. Review: What is inside the atom? ParticleProtonElectronNeutron Electric Charge Mass

5. What Atom is this? + + + + + + o o o o o + - - - - - - -

6. Normally…

7. Static Charges + + + - + + + - + - + - + - - - + - Neutral Object Negatively Charged Object Positively Charged Object

8. What Electrically Charges Objects? 1. Contact Electrons get passed from one object to the other when they touch

9. 2. Induction Electrons in the object move away or towards another charged object is placed close to it *no contact, the electrons just re- orient themselves because electrons can move

10. 3. Friction Adds or removes electrons  some objects do this more easily than others (Electrostatic series page 276 of text) http://phet.colorado.edu/sims/html/balloons -and-static-electricity/latest/balloons-and- static-electricity_en.html

11. 3 LAWS OF ELECTROSTATICS 1.2.3. An instrument which detects electric charge ELECTROSCOPE

12. Ways to Group Materials Electrically Speaking 1) Electron Affinity 2) Conductivity

13. Insulators and Conductors Insulators don’t let electrons flow through them Insulators don’t let electrons flow through them Conductors let electrons flow through them Conductors let electrons flow through them Electrons stay stuck on the surface and don’t move— That’s STATIC ELECTRICITY!

14. EXAMPLES ….(see electrostatic series pg. 276) ConductorsFair ConductorsInsulators

15. Coulombs Law: Any two charged objects will create a force on each other http://www.youtube.com/watch?v=rYjo774UpHI

16. Charge the symbol Q Unit of Charge (Q) is the Coulomb 1 Coulomb = 6.24 x 10 electrons 18