1. ELECTRICITY

2. JAGMARK 1.Complete the worksheet titled JagMark 2.Clean out your INB – Recycle the old notes and used pages. CLEAN UP ALL TRASH!

3. INTRO TO ELECTRICITY

4. ELECTRICITY: A FORM OF ENERGY RESULTING FROM THE EXISTENCE OF CHARGED PARTICLES

5. WHAT IS A CHARGED PARTICLE? WHEN A PARTICLE HAS AN IMBALANCE OF ELECTRONS AND PROTONS IT IS CONSIDERED “CHARGED.”

7. CHARGE IT! An object becomes charged by gaining or losing an election.

8. CHARGE IT! Gain an electron: negative charge Lose an electron: Positive charge

9. HOW TO CHARGE AN OBJECT… Friction: rubbing together Conduction: direct contact Induction: no direct contact

10. LAW OF ELECTRIC CHARGES Like charges repel Opposites attract

11. Repel Attract

12. ELECTRIC FORCE The force between charged objects.

13. ELECTRIC FORCE  The greater the charges the greater the electric force.  The closer together the charges area, the greater the electric force.

14. ELECTRIC FIELD Region around a charged particle that can exert a force on another charged particle.

15. ELECTRIC FIELD

16. CONSERVATION OF CHARGE Law of conservation: a charge is not created or destroyed it is only transferred.

17. How does plastic wrap cling to food containers?

18. STATIC AND CURRENT

19. ELECTRICITY CAN EXIST IN TWO WAYS: As static or as a current Not moving moving

20. ELECTRIC CURRENT – FLOW OF CHARGES Charges are often transferred between objects. Different materials differ in their ability to transmit charges Plastic Metal

21. MOVING CHARGES Conductor A material in which charges can move easily. Insulator A material in which charges cannot easily move.

22. STATIC = NOT MOVING

23. STATIC ELECTRICITY Buildup of electric charges on an object.

24. HOW TO CHARGE AN OBJECT… Friction: rubbing together Conduction: direct contact Induction: no direct contact

25. ELECTRIC DISCHARGE As charges leave an object it is called electric discharge.

26. LIGHTNING

27. BUILD UP AND DISCHARGE OF STATIC

28. ELECTRICITY IS LAZY… Electricity always seeks the easiest path to the ground.

29. ELECTRICITY IS LAZY… It tries to find a conductor, such as metal, wet wood, water—or your body! Your body is 70% water. So if you touch an energized bare wire or faulty appliance while you are grounded, electricity will instantly pass through you to the ground, causing a harmful, or fatal, shock.

30. GIVE ELECTRICITY A SAFE PATH -- GROUNDING Grounding Prong

31. ELECTRIC CELL

32. CELL a device that produces an electric current by converting chemical energy into electrical energy.

33. CELL Every cell contains a mixture of chemicals that conducts a current – this mixture is called an electrolyte

34. CELL Every cell has electrodes where the charges enter or exit.

37. BATTERY Made up of multiple cells

38. WHAT TYPE OF ENERGY? POTENTIAL OR KINETIC?

39. WHY DO BATTERIES WORK? Since there is such a difference in charge between the two electrodes, an electric current starts.

40. POTENTIAL DIFFERENCE The energy per unit charge is called the potential difference and is expressed in volts (V).

41. POTENTIAL DIFFERENCE As long as there is a potential difference between the electrodes of a cell and there is a wire connecting them, charges will flow through the cell and wire creating an electric current.

42. BATTERIES ARE MADE WITH DIFFERENT POTENTIAL DIFFERENCES The potential difference depends on the number of cells it contains

43. ELECTRIC CURRENTS