Title: Static Electricity
1Static Electricity
- By
- Brianna Shields
- April 27, 2005
2DO 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?
3GOAL
- To explain the occurrence of static electricity
4Review 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
5Review 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
6Review 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
7Review 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
8Review 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
9Review 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
10Review Find the fiction
- Digestion is a type of chemical energy
- Rainbows are a type of mechanical energy
- Sound is a type of mechanical energy
11Review 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
12Review 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
13Review 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
14Review Find the fiction
- Photosynthesis involves chemical energy
- Digestion involves chemical energy
- Sound involves chemical energy
15Review Find the fiction
- Photosynthesis involves chemical energy
- Digestion involves chemical energy
- Sound involves chemical energy- FALSE
16Review 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
17Review 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
18Atom Review
- Positive (P)
- Found in the nucleus
- Neutral (N)
- Found in the nucleus
- Negative (e-)
- Found zipping around outside the nucleus
19Bohr Model
20How do atoms become charged?
- Draw a sketch of 2 atoms being rubbed together-
how do they become charged????
21Atom Review
- Extra electrons negatively charged object/atom
- Missing electrons positively charged
object/atom
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23Atom Review
- Opposite charges attract
- Proton-electron
- Like charges repel
- Electron-electron
- Proton-proton
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25Atom Review
- The accumulation of extra negative electrical
charges on an object - Only electrons are transferred (not protons)
26Static Electricity Video Questions
- Explain why your hair becomes attracted to a
balloon once its been rubbed on your head
27Static 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
29Scenario 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
30Scenario 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).
31Scenario 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
32Scenario 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
33Scenario 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
34Scenario 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
35Scenario 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
36Scenario 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
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38Scenario 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
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41Atom Review
- Allows electricity (electrons) to easily pass
through it - Ex Metals
42Atom Review
- Provides resistance to electron flow (blocks it
or slows it down) - Ex rubber, wood, plastic, glass
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