3. What Gives Matter a Charge?

4. A particle with a positive charge is called a/an _______________. proton electron neutron

5. A particle with a negative charge is called a/an _______________. proton electron neutron

6. _________ means to push away. _________ means to pull together. charge attract repel charge attract repel

7. If an electrically-neutral object GAINS electrons, what charge does it now have? positive negative neutral

8. If an electrically-neutral object LOSES electrons, what charge does it now have? positive negative neutral

9. How Charges Interact  Objects with opposite charges (one negative, one positive) will attract each other.  Objects with like charges (both negative or both positive) will repel each other.

10. Let’s start with some vocab… Electricity- a form of energy resulting from charged particles. Circuit- a closed loop that electrons can flow through

11. What is the difference between open and closed circuits?

12. Open circuit: An incomplete path that will not permit an electric current to flow

13. Closed circuit: A complete path for electric current

14. Quiz: What type of circuit is shown in each of the following examples? Open circuit Closed circuit

15. Open circuit Closed circuit

16. Click on a term to reveal its definition and examples. Conductor Insulator Continue

17. Insulator: a substance through which electricity can not flow readily Examples… woodplasticrubber sulfur glass

18. Conductor: a material through which electrons can move easily Examples… brassaluminumcopper graphite water

19. Which of these items are conductors?

20. Which of these items are insulators?

21. How a Circuit works

22. What’s the Best Pathway for Electrons? http://www.youtube.com/watch?v= VnnpLaKsqGU

23. There are two main types of circuits: ParallelSeries and

24. Parallel circuits are circuits with more than one pathway through which electrons can flow. Series circuits are circuits with only one pathway through which electrons can flow.

25. What type of circuits are shown in the following examples? parallelseries

26. parallelseries

27. How energy is supplied to a circuit: Battery: -Has two TERMINALS: -One positively charged & one negatively charged -Separator in the battery that keeps the positive and negative sides from touching, while allowing charged particles to pass through the battery

28. Electric Potential Energy -This separation of charges causes a build up of potential energy (potential difference). -Electrons flow from an area of high PE to low PE. -Just like gravitational potential energy… -Video: http://www.youtube.com/ watch?v=Aq31mjWYdJ8 http://www.youtube.com/ watch?v=Aq31mjWYdJ8

29. Battery cont -When a circuit is created, electrons flow from the negative end to the positive end -electrons are repulsed by the negative side and attracted to the positive side

30. What energy conversions take place in an electrical circuit? _______________  _________________  ______________

31. -A Separator inside a battery causes a separation of charges -This separation of charges causes a build up of potential energy. -Electrons flow from an area of high PE to low PE. -Just like gravitational potential energy… (recall video) Review from yesterday…

33. Electricity Vocab.

34. Coulomb: is the unit for charge There are about 6.24x 10 18 electrons in one coulomb

35. Potential Difference (voltage) Voltage: amount of potential energy supplied to each coulomb of charge Units- volts (V) Is dependent on the energy source NOT the circuit! After the reading “what is voltage?”

36. Voltage is like water pressure, a “force” that causes the current to flow

37. Current The rate (“speed”) at which electrons flow Unit- ampere (A) (aka “amps”) An amp is one coulomb of charge per second

38. Resistance Opposes the flow of charge Unit- Ohms (  ) Created by resistors

39. How are resistance and current related? - Lab and worksheet