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May 21, 2012 HW: 6.2 PTG, Pg. 612-613, #1-4 and Vocab Boxes Due Friday

May 21, 2012 HW: 6.2 PTG, Pg. 612-613, #1-4 and Vocab Boxes Due Friday. LO: Use a physical model to describe the flow of electric charges in series and parallel circuits. SC: Develop a physical model for electric current and potential energy

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May 21, 2012 HW: 6.2 PTG, Pg. 612-613, #1-4 and Vocab Boxes Due Friday

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  1. May 21, 2012HW: 6.2 PTG, Pg. 612-613, #1-4 and Vocab Boxes Due Friday • LO: • Use a physical model to describe the flow of electric charges in series and parallel circuits. • SC: • Develop a physical model for electric current and potential energy • Use this physical model to trace the flow of electric charges in series and parallel circuits. • DO NOW: • 6.1 Quiz • Write LO and SC on new left side page • WDYS/WDYT-pg. 606 • Investigate • Part A: vocabulary with pretzels

  2. Ch 6 Section 2 • Students assemble like picture on page 607. • Teacher = switch • 1 student = battery • 1 student – light bulb • Rest = charges (only charged when student has pretzel in their hand)

  3. Part A • Round 1 • Battery=energy supply=joules=pretzels • Light bulb=dancing student • Electric charges=coulomb=students • 6230000000000000

  4. Part A • Round 2: • Battery=energy supply=joules=pretzels • “I am one VOLT, which means, I give one joule (pretzel) of energy to each coulomb (student)” • “Please move along, one coulumb (student) per second is one amp of current” • Light bulb=dancing student • “I just received one joule (pretzel) of energy from that coulomb (student) • Electric charges=coulomb=students • “I just gained one joule of energy from the battery” • “I just gave one joule of energy to the light bulb”

  5. Part A • Round 3 • Battery is 3 Volts • Gives each coulomb 3 joules of energy

  6. Part A • Round 4 • Battery is 1 Volt • Current is 2 amps=2 coulombs per second

  7. May 22, 2012HW: 6.2 PTG, Pg. 612-613, #1-4 and Vocab Boxes Due Friday • LO: • Use a physical model to describe the flow of electric charges in series and parallel circuits. • SC: • Develop a physical model for electric current and potential energy • Use this physical model to trace the flow of electric charges in series and parallel circuits. • DO NOW: • #9 page 608: a, b, c, d, e, f • Agenda • Investigate • Part B: vocabulary with pretzels

  8. Students answer… • #9 page 608: a, b, c, d, e, f

  9. Part B • Series circuit • 2 light bulbs, each must get some energy • Battery is 1 Volt • Charges have to spread their joule (pretzel) to each light bulb equally

  10. Students answer… • #2 a • #3 a, b, c, d

  11. #4 • 1V battery = 1 J of energy (pretzel) for each coulomb (student) of charge • Charges flowed at the rate of 1 amp (or 1 coulomb per second=1 student per second) • The # of Joules (pretzels) per second that a bulb receives determines how BRIGHT the bulb is • Joules per second=Power (measured in Watts) • 1 Watt=1 Joule/sec • Which will be brighter? A 100-W bulb or a 40-W bulb? Why?

  12. Students answer… • #4a: copy table at top page 609

  13. Vocabulary Boxes • Potential energy • Electric potential energy • Battery • Resistor • Coulomb • Current • Voltage • Volt • Joule • Ampere • Series circuit • Watt

  14. HW: 6.2 PTG, Pg. 612-613, #1-4 • LO: • Use a physical model to describe the flow of electric charges in series and parallel circuits. • SC: • Develop a physical model for electric current and potential energy • Use this physical model to trace the flow of electric charges in series and parallel circuits. • DO NOW: • Find the joules per second for a 3 volt battery, with a 5 amp current. • Investigate • Part A: vocabulary with pretzels

  15. Physics Talk Expectations • Volume • Actions • Questions? • Finished with the slide? • Students are quiet and headphones are off • Notebooks are out and pencils are recording information from the board • Students must raise their hand to ask or answer questions. • Please wait patiently without talking or distracting your neighbor

  16. Physics Talk 6.2 • How is your bloodstream similar to an electric current? • Like blood cells, electrons carry energy to the light bulb. The energy is used up (pretzel/joule), but the electron is not (student)

  17. Physics Talk 6.2 • What is electrical potential energy? • Energy that has not get been used up and is being help by an electron or battery

  18. Physics Talk 6.2 • What is a resistor? • An object in an electrical circuit that consumes energy. This object will often determine how quickly the electrons can pass by (current)

  19. Physics Talk 6.2 • An explanation of the electron shuffle

  20. Physics Talk 6.2 • What is a series circuit? • An electrical circuit where there is only one path for the electrons to follow • The electrons move with the same current throughout the entire circuit

  21. Physics Talk 6.2 • How do we represent a series circuit?

  22. Physics Talk • What determines the brightness of a light bulb? • The number of Watts, or Joules per second. • You can use the following equation for a series circuit (that you Ayo and Arthur) • W = Power • V= Volts • A= current (amperes) • R = resistors, or number of light bulbs

  23. Essential Questions-pg. 612 • What does it mean? • How do you know? • Why should you care?

  24. Vocabulary BoxesBook Definition – Your Definition - Picture • Potential energy • Electric potential energy • Battery • Resistor • Coulomb • Current • Voltage • Volt • Joule • Ampere • Series circuit • Watt

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