1. Static Electricity
S Investigate and explain electrostatic phenomena using the particle model of electricity.
- Include: conservation of charge, conduction, grounding, attraction of a neutral insulator,
induction. GLO: A2, D3, D4, E4

2. Review Static Electricity Material that gains electrons
When a charge builds up on the surface of an object and does not move
Material that gains electrons
becomes negatively charged
Material that loses electrons
becomes positively charged

3. Conductors and Insulators
Material where a charge is built up on the place it was rubbed
Charges do not move freely on or through the material
Conductor
Material where a charge can move freely

4. Conductors and Insulators
Good Conductors
Fair Conductors
Insulators
Silver
Silicon
Amber
Copper
Carbon
Cotton
Gold
Human Body
Ebonite
Aluminum
Humid Air
Fur
Zinc
Salt Water
Glass
Nickel
Paper
Brass
Plastic
Iron
Porcelain
Rubber
Silk
Wool
Wood

5. Types of Charge
Negative charge
Positive Charge

6. Law of Electric Charges
Two objects with a like charge will always repel one another
Two objects of opposite charge will always attract each other
What about neutral objects?

7. Law of Electric Charges
If an object is charged it will ATTRACT
Neutral objects
Objects with opposite charge
If an object is charged it will REPEL
Objects with the same charge

9. Types of Charging Charging by friction
Electric charges that are transferred by rubbing action
Laundry tumbling around in a dryer
Walking across a carpet
Air rushing over a car or airplane
Gasoline rushing out of a hose

10. Types of Charging Transferring charge by contact
Occurs when one object is charged and the other is charged or neutral
Extra electrons are transferred rapidly from one object to another

11. Grounding Discharged/ Neutralized
Occurs when an object has all of it’s extra electrons removed
Connecting the object to the earth

12. Grounding
Grounding
When a charged object is connected to the ground it shares it’s extra electrons with the Earth
Damp soil is a good conductor and it can remove almost all excess charges

13. Types of Charging Charging by induction
When a charge happens by indirect contact

14. Types of Charging
Charging by induction

15. Types of Charging Charging by induction
When one object that is negatively charged comes close to a neutral object, it pulls the positive particles to it

16. Types of Charging Charging by induction
When the neutral object is grounded, the free electrons go into the ground, leaving positive particles behind
EARTH

17. Types of Charging Charging by induction
The second particle became charged without ever touching the negatively charged particle