2. STATIC ELECTRICITY

3. Electric charge 12 p+ Atoms are neutral Same # of protons as electrons

4. Electric charge 12 p+ Overall charge  +2 When electrons are gained or lost, atom has an overall charge (net electric charge)

5. Attract or repel? Opposites Attract Like charges repel + ++ - --

6. Are we alike? You are made of atoms which have protons and electrons Electrons move through you easily

7. What holds/transfers charge? conductors Electrons easily move through conductors insulators Electrons do not easily move through insulators (BUT insulators can still become charged)

8. Three ways to transfer charge: friction Charge by friction induction Charge by induction contact Charge by contact

9. FRICTION: friction Charge by friction Law of Conservation Charge  Rubbing does not create charge, it merely transfers charge.

10. CONTACT Charge by contact Law of Conservation Charge  Both objects end up with the same type of charge (but now have less of it).

11. INDUCTION induction Charge by induction PHET animation Law of Conservation Charge  Induction separates charge in the object, but the number of protons and electrons remains the same (assuming the object was initially neutral).

12. More with Induction

13. Electricity is everywhere! No electricity