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Static Electricity

Static Electricity. By: Brianna Shields April 27, 2005. DO NOW. 1. Which of the 5 main types of energy is released when food is digested? 2. A child seated at the top of a slide has what type of energy (kinetic or potential)?

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Static Electricity

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  1. Static Electricity By: Brianna Shields April 27, 2005

  2. DO NOW • 1. Which of the 5 main types of energy is released when food is digested? • 2. A child seated at the top of a slide has what type of energy (kinetic or potential)? • 3. Speaking to a crowd requires which of the 5 main types of energy?

  3. GOAL • To explain the occurrence of static electricity

  4. Review: Find the fiction • Electromagnetic energy is the movement of electrical charges • Chemical energy is the splitting of the atom’s nucleus • Heat energy is warmth created when particles rub quickly together

  5. Review: Find the fiction • Electromagnetic energy is the movement of electrical charges • Chemical energy is the splitting of the atom’s nucleus- FALSE • Heat energy is warmth created when particles rub quickly together

  6. Review: Find the fiction • Chemical energy is the breaking and releasing of bonds between atoms • Electromagnetic energy is the movement of proton particles • Nuclear energy is created by the splitting of an atom’s nucleus

  7. Review: Find the fiction • Chemical energy is the breaking and releasing of bonds between atoms • Electromagnetic energy is the movement of proton particles- FALSE • Nuclear energy is created by the splitting of an atom’s nucleus

  8. Review: Find the fiction • Sound is a type of electromagnetic energy • Light is a type of electromagnetic energy • X rays are a type of electromagnetic energy

  9. Review: Find the fiction • Sound is a type of electromagnetic energy- FALSE • Light is a type of electromagnetic energy • X rays are a type of electromagnetic energy

  10. Review: Find the fiction • Digestion is a type of chemical energy • Rainbows are a type of mechanical energy • Sound is a type of mechanical energy

  11. Review: Find the fiction • Digestion is a type of chemical energy • Rainbows are a type of mechanical energy- FALSE • Sound is a type of mechanical energy

  12. Review: Find the fiction • Chemical energy creates warmth when particles rub together quickly • Mechanical energy is used by moving objects • Electromagnetic energy involves the movement of negative electrons

  13. Review: Find the fiction • Chemical energy creates warmth when particles rub together quickly- FALSE • Mechanical energy is used by moving objects • Electromagnetic energy involves the movement of negative electrons

  14. Review: Find the fiction • Photosynthesis involves chemical energy • Digestion involves chemical energy • Sound involves chemical energy

  15. Review: Find the fiction • Photosynthesis involves chemical energy • Digestion involves chemical energy • Sound involves chemical energy- FALSE

  16. Review: Find the fiction • Rubbing your hands together involves both mechanical and heat energy • Using a blow dryer involves both electromagnetic and heat energy • Listening to the radio involves both electromagnetic and chemical energy

  17. Review: Find the fiction • Rubbing your hands together involves both mechanical and heat energy • Using a blow dryer involves both electromagnetic and heat energy • Listening to the radio involves both electromagnetic and chemical energy- FALSE

  18. Proton Neutron Electron Positive (P+) Found in the nucleus Neutral (N) Found in the nucleus Negative (e-) Found zipping around outside the nucleus Atom Review

  19. Bohr Model

  20. How do atoms become charged? • Draw a sketch of 2 atoms being rubbed together- how do they become charged????

  21. Charged atoms Extra electrons = negatively charged object/atom Missing electrons = positively charged object/atom Atom Review

  22. Subatomic Particle Rules Opposite charges attract Proton-electron Like charges repel Electron-electron Proton-proton Atom Review

  23. Static Electricity The accumulation of extra negative electrical charges on an object Only electrons are transferred (not protons) Atom Review

  24. Static Electricity Video Questions • Explain why your hair becomes attracted to a balloon once it’s been rubbed on your head

  25. Static Electricity Video

  26. For each of the following static electricity examples you must do the following: • 1. Draw a picture • 2. Accompany it with an explanation

  27. Scenario 1: If you shuffle your feet on the carpet, then reach out to touch a metal door knob, you receive a shock by a spark • Rubbing disturbs the atoms • Electrons rubbed off carpet and onto your feet • Shoe has extra e’s (negative chg) • Rug is missing e’s (positive chg) • Extra electrons from the shoe are transferred to the doorknob in the form of an electrical spark

  28. Scenario 2: Clothing sometimes clings together upon removal from the dryer- Why? • Electrons rub off clothes and stick to others • Some items get a negative charge • These clothes are attracted to the ones with a positive charge (clothes missing electrons).

  29. Scenario 3: Charging by Induction- charged object and neutral object attract when atoms in neutral object rearrange their protons and electrons • Rub a balloon w/ a cloth to charge it, it accumulates extra negatives on it • Bring it close to a wall and it rearranges the atoms on the wall • It pulls protons closer and pushing electrons away

  30. Scenario 4: Bending Water • Charge the rod, bring it close to water • It rearranges the electrons in the water causing the protons to be attracted to the negative rod

  31. Scenario 5: A shocking experience • Rub the balloon on a wool shirt • Bring the balloon near you hair and it attracts the hair • The electrons on the balloon attract the protons in the hair through charging by induction

  32. Scenario 6: Pumping Gas • Rubbing against car upholstery, talking on the cell phone can generate static electricity • If the electrons are not discharged by touching a non-hazardous metal object (like a car door) they may be a potential fire risk while pumping gas

  33. Scenario 7: Bandaids and Certs • Plastic Cur-aid bandaids will “spark” when you rip the white tabs off quickly as electrons are stripped and transferred • Snapping or quickly biting into wintergreen or peppermint certs mints can cause a spark of electrons

  34. Scenario 8: Van de Graff Generator • This apparatus generates electrons as the belt spins • Electrons are free to pass through the metal sphere • It is grounded with a metal wand protected by a plastic handle, hooked into the faucet • Anyone touching the generator also gathers electrons, when you remove your hands you get a big shock

  35. Scenario 9: Lightning • The accumulation of negative charge in clouds • Electrons transfer to positively charged ground to even out the charge • Produces electrical spark known as lightning

  36. Conductor Allows electricity (electrons) to easily pass through it Ex: Metals Atom Review

  37. Insulator Provides resistance to electron flow (blocks it or slows it down) Ex: rubber, wood, plastic, glass Atom Review

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