1. Electrical Conductivity Insulators and Conductors

2. Insulators
An electrical insulator is a substance that resists or blocks the movement of electrons
Insulators can hold a static charge because static charges remain nearly fixed in place
Examples of good insulators: plastic, glass, dry wood

3. Conductors
An electrical conductor is a substance in which electrons can move freely
If a conductor becomes negatively charged with electrons, they move freely along the conductor
Examples of good conductors: copper, aluminum

4. Common Conductors and Insulators
Good Conductors
Fair Conductors
Good Insulators
Silver
Copper
Gold
Aluminum
Magnesium
Nickel
Mercury
Platinum
Iron
Carbon
Human body
Moist human skin
Acid solutions
Salt water
Earth
Water vapour (in air)
Oil
Fur
Silk
Wool
Rubber
Glass
Plastic
Wood
Paper
Wax