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Static Electricity

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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 ... – PowerPoint PPT presentation

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Title: Static Electricity


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

19
Bohr Model
20
How do atoms become charged?
  • Draw a sketch of 2 atoms being rubbed together-
    how do they become charged????

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

22
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23
Atom Review
  • Subatomic Particle Rules
  • Opposite charges attract
  • Proton-electron
  • Like charges repel
  • Electron-electron
  • Proton-proton

24
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25
Atom Review
  • Static Electricity
  • The accumulation of extra negative electrical
    charges on an object
  • Only electrons are transferred (not protons)

26
Static Electricity Video Questions
  • Explain why your hair becomes attracted to a
    balloon once its been rubbed on your head

27
Static Electricity Video
28
  • For each of the following static electricity
    examples you must do the following
  • 1. Draw a picture
  • 2. Accompany it with an explanation

29
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 es (negative chg)
  • Rug is missing es (positive chg)
  • Extra electrons from the shoe are transferred to
    the doorknob in the form of an electrical spark

30
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).

31
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

32
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

33
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

34
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

35
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

36
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

37
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38
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

39
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40
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41
Atom Review
  • Conductor
  • Allows electricity (electrons) to easily pass
    through it
  • Ex Metals

42
Atom Review
  • Insulator
  • Provides resistance to electron flow (blocks it
    or slows it down)
  • Ex rubber, wood, plastic, glass

43
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