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Electricity Presentation Outline 135

This presentation explores different ways to make a light bulb light, how to create a circuit, and the concept of current flow. It also includes hands-on activities and discussion prompts.

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Electricity Presentation Outline 135

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  1. Electricity Presentation Outline135 Created for B.W. By Dick Heckathorn 21 March 2K + 12

  2. Table of Contents Day 13 Feb 21 Tues Day 14 Feb 23 Thurs 7 Day 19 Mar 20 Tues __ Day 20 Mar 22 Thurs 106 Day 21 Mar 27 Tues 125 Day 22 Mar 29 Thurs Day 19 Jan 31 Tues Day 20 Feb 2 Thurs Day 21 Feb 7 Tues Day 22 Feb 9 Thurs Day 23 Feb 14 Tues Day 24 Feb 16 Thurs 2

  3. Start 103

  4. Table of Contents • A How many ways can you make a light bulb light? • B How can you make the bulb light when it is not touching the battery? • C How can you explain the mystery circuit? • D Where does the current go? • E Does the size of the battery change the brightness of the bulb? • F Is it wet or is it dry? • G How can you get more than one bulb to light in a circuit? • H What is another way to get more than one bulb to light in a circuit?

  5. Table of Contents • I Using two batteries in series • JUsing two batteries in parallel • K How many bulbs with one battery light? • L Quiz: Will the bulbs light? • M How is the strand of 35 Christmas tree lights connected? • N Where are the wires in your mystery package? • O How can you make a simple switch? • P How can you make a 3-way switch? • Q Can mechanical energy be converted into electrical energy? • S Making Battery Holders with rubber bands and clips

  6. Items in Plastic Bag 1. Film canister with bulb and wire (use with item A, B and C only) 2. D-Cell battery - 1 3. battery holder - 1 4. bulb holder - 2 5 flashlight bulbs – 2 6. 20-cm copper conducting wires – 2 7. envelope with 5 clip leads 8. Christmas bulbs - 4 9. Green wire with bare ends - 6 10. 2“ x 2“ inch cardboard - 3 11. small paper clips - 3 12. brad fasteners - 8

  7. Items in Plastic Bag • 1. Film canister with bulb and wire • (use with item A, B and C only) • 2. D-Cell battery - 1 • 3. battery holder - 1 • 4. bulb holder - 2 • 5 flashlight bulbs – 2 • 6. 20-cm copper conducting wires – 2 • 7. envelope with 5 clip leads • 8. Christmas bulbs - 4 • 9. Green wire with bare ends - 6 • 10. 2“ x 2“ inch cardboard - 3 • 11. small paper clips - 3 • 12. brad fasteners - 8

  8. Info - Assignment • Page 125 – 134? Turn In • Look at 134 • Assignment

  9. A. How Many Ways Can You Make A Light Bulb Light?3A1 p 61 Dry cell (Flashlight Bulb, Wire) in film canisters in special box

  10. 1. Using your materials, make your bulb light. • (Be careful ... If you begin to feel heat in the wire remove the wire from the battery.)

  11. 2. How many different ways can you get your bulb to light? • Did anyone not get a bulb to light?

  12. 3. Draw pictures below of the ways that you got the bulb to light and ways that you did not get it to light. • Ways Bulb Lights • Ways Bulb Did Not Light

  13. 3A1 p 61 • p 61 – 2nd paragraph under management tips • - all must do • - all adequate time • p 63 – examine first two paragraphs • p 63 - Summary

  14. Look at top andbottom of a battery to see where good contact can be made. (Always check new batteries. 14

  15. B. How Many Ways Can You Make a Bulb Light When it is Not Touching the Dry Cell3A2 p 65 Dry cell Container with (bulb, 2 wires)

  16. 1. Using your materials, make the bulb light when it is not touching the battery. • 2. Draw wires on the picture below to show how you got the bulb to light.

  17. 3. Where must the wire(s) touch the battery to light the bulb?

  18. 4. Where must the wire(s) touch the bulb for it to light?

  19. 5. Make a rule about lighting the bulb using your observations.

  20. 3A2 p 65 • p 66 – What about using rechargeable batteries? • p 66 – Summary Discussion • - what emphasize? • p 67 – What do you see?

  21. C. How Can You Explain the Mystery Circuit?3C1 p 69 Dry cell Bulb and wire (2)

  22. 1. Test your bulb and battery to make sure that the bulb will light.

  23. 2. Look at the circuit in the drawing below.

  24. 3. The wire is touching the two special places on the bulb. Predict whether the bulb will light. Explain why.

  25. 4. Use your materials to see if the bulb will light.

  26. 5. What did you observe? • Explain what happened? • 7. Identify the path the electricity travels on the diagram above.

  27. 3C1 p 69 • p 69 – management tips • p 69 – Responses to questions • p 69 – Points to emphasize

  28. D. Where Does the Current Go?3C2 p 71 Dry cell Bulb and wires Bulb holder Battery holder

  29. 5. What happened? 6. What happens to the bulb? 2. Make sure your bulb lights. 4. Try it. 1. Construct the following circuit • 3. Predict what will happen when a wire is placed between wires 1 & 2? Non-covered wire Non-covered wire Page 4

  30. 5. What do you predict will happen if you touch the end of wire 1 with the end of wire 2 outside the bulb holder? 1 2

  31. 8. Identify the path the current travels on the diagram above when wires 1 and two are touched . 6. What happened to the bulb? 7. Explain why it happened. 1 2

  32. 3C2 p 71 • P 72 – What are the management tips? • P 72 – Responses to questions • P 72 – Summary • - What is a “short circuit?” • - an “easy circuit” • - or an “easier circuit”

  33. E. DOES THE SIZE OF THE BATTERY CHANGE THE BRIGHTNESS OF THE BULB? 3D4 p 81 • batteries - D, AA, AAA, NiMh • Polaroid Camera • box of old batteries • Christmas tree bulb

  34. 1. Observe the brightness of the bulb when connected to the D-cell battery. Page 2

  35. 2. How do you think the brightness of the bulb when connected to the D-cell will compare to connecting the bulb to the AAA-cell. Predict, try it, and then write what you found.

  36. 3. What do you observe about the brightness of the bulb when connected to other batteries? Make comparisons to the brightness of the bulb when connected to a D-cell? • AAA • AA • AA - NiMH (rechargeable) • 9-volt

  37. Explain why the brightness of the bulb was the same for different batteries. • Explain why the brightness of the bulb was different for different batteries. Page 2

  38. 3D4 p 81 • A volt is: • Current is: • p 82 – Answers – possible variances • p 82 Web sites

  39. F. Is It Wet or Dry?5A2 p 117 1 battery to cut apart hacksaw vice box of old batteries pipe cutter 43

  40. Homework • p 85 – Christmas Tree Lights – a Continuous Series • p 91 – 96 Electric Circuits

  41. 1. Have your instructor cut a D-cell battery apart. 2. What precautions must be taken before one begins cutting apart the battery. 3. Describe what you observe as the battery is cut apart. 45

  42. 4. Examine the sectional view of the battery. The plus terminal is the carbon rod and the negative terminal is the zinc case. (see box with old batteries in it) 46

  43. When the cell is operating, zinc atoms from the negative plate form zinc ions. At the positive carbon rod, ammonium ions gain electrons, forming ammonia and hydrogen gas. 47

  44. The ammonia gas is taken up by the zinc chloride. The hydrogen reacts with the manganese dioxide. Since carbon and zinc are used as the electrodes, the dry cell has a voltage of approximately 1.5 volts. 48

  45. If the battery is in constant use, a build-up of gas may occur and cause the case to burst at the weakest point. 49

  46. Leakage of the battery may then occur with corrosion of the parts near the battery. Therefore it is essential that one take the batteries out before this occurs. 50

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