2. Proceed

3. INTRODUCTION INTRODUCTION / Maybe think about this situation: You are getting ready for Christmas, Channukah, and / or the Winter Solstice and putting up festive lights. PROCEED

4. INTRODUCTION / Suddenly, you step on one of them and it breaks!!!!!!! Not only does that light break, all the lights after that one stop working as well! Why is this happening?

5. INTRODUCTION / This power point presentation is made to further explain the science behind this modern day conundrum. /T/This power point presentation is made to further explain the science behind this modern day conundrum. In this presentation I will discuss Ohm's laws, series and parallel circuits as well as well as answer basic questions such as "what is a circuit". It's suprising but most people don't know!

6. VOCAB / Resistor - a device designed to introduce resistance into an electric circuit. Battery- a combination of two or more cells electrically connected to work together to produce electric energy.

7. Vocab / Electron- a unit of charge equal to the charge on one electron.

8. VOCAB  Ohm’s Law- Ohm's law is a statement that specifies the relationship between electricity to resistance and voltage. This law is used to measure electric currents. Ohm's law states that the current of electricity is equal to the voltage divided by the resistance. This means that current and voltage are proportional. However the current is indirectly proportional to resistance. This relationship is similar to force to mass. F=ma. This was created by George Ohm in 1826

9. VOCAB / Circuit- the complete path of an electric current, including the generating apparatus, intervening resistors, or capacitors. http://www.faculty.fairfield.edu /jmac/sj/cj/5cj8mng.JPG George Ohm

10. CIRCUITS / We use the word circuit all the time, but what really is a circuit?? A circuit is any path along which electrons can flow. A circuit is usually controlled by a switch, so when the switch is closed (i.e a light switch turned on) the circuit will run. A circuit is the science behind any electronics we use. A circuit is most commonly connected two ways, in a series is one way. The other way to wire a circuit is in a parallel circuit.

11. SERIES CIRCUIT / What is a series circuit? A series circuit is a way of connecting circuits so that there is only one path for an electron to take. Christmas lights are assembled in a series circuit and this is why the conundrum happens.

12. SERIES CIRCUIT / Let me explain. In a series circuit, there is only one path for the electron to take, a.k.a one wire, as on christmas lights. http://www.pha.jhu.edu/dept/lecdemo /img/EM-f2a_400x300.jpg

13. SERIES CIRCUIT / A prime example of a series circuit. http://iss.cet.edu /electricity/pages/ images/G/g1_3.jpg

14. PARALLEL CIRCUITS / A slightly more complicated but more practical way to wire circuits is in parallel circuit. In a parallel circuit, electrical devices are connected to TWO points on an electrical circuit. This allows an alternative path for the electron to take if the resistance forces the electron to not continue on that particular path.

15. PARALLEL CIRCUITS / http://www.pha.jhu.edu/dept/lecdem o/img/EM-f2a_400x300.jpg An example of a parallel circuit

16. PARALLEL CIRCUITS http://webhw.unca.edu/roberts_phys222/Content/labs /multimeter/images/parallel_circuit.gif A parallel circuit are wired so that An electron has more than one route If Christmas lights were wired Parallel then the conundrum would Be solved!

17. Survey I asked 20 adults if they knew what caused the lights to go out when one breaks. This was their response.

19. Relative Links / The Physics Classroom The Physics Classroom / Wikipedia Wikipedia / Websters Websters / Nasa Nasa / The Physics Classroom The Physics Classroom / Wikipedia Wikipedia / Websters Websters / Nasa Nasa The Physics Classroom is a great site for helping diagrams as well As simple definitions to give you the tools you need for understanding. I used wikipedia to look up formulas and specific models that helped Shape my understanding of circuits I used websters for all my definitions. I used the “Nasa files” to try to find Helpful explanations and images. A series circuit. http://scifiles.larc.nasa.gov/text/kids/Problem_Board/problems/electricity/circuits2.html

20. CONCLUSION / In conclusion, the reason all the lights following a broken light on a Christmas tree go out is because they are wired in a series circuit, and the electron can not pass through.