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Electricity Notes (Unit 8 Lesson 1) Electricity is: A form of energy made of a negative charge (electrons) that can be used to make heat, light or motion. 2 Types of Electricity: 1. Static Electricity - an electric charge that builds up on the surface of an object - it is discharged in one quick burst - Examples: static shock, lightning, static cling 2. Current Electricity - the flow of electrical charges carried through a wire or other conductor. - it is a steady FLOW of electrons - it can be controlled by changing the voltage or resistance of the current - Voltage is the power behind the circuit & Resistance is the material it’s flowing through - Examples: power lines, computers, appliances Conductor - any material that allows electric charges to move through it - Examples: metals, your body, electric wires, water Insulator - materials that resist the flow of electrical charges - Examples: wood, glass, rubber, plastic Ways Electricity is transferred Friction - occurs when two objects are rubbed together, causing a transfer of electrons between the two objects - Examples: rubbing a balloon against your hair; getting shocked when you rub your socks on a carpet when you’re walking across the rug Contact - when a charged object comes into contact with an uncharged object, the charged object will transfer some of its charge to the area it touches - Examples: touching a Van de Graaff generator Induction - way of rearranging the charges within an object without touching it - Examples: lightning in a cloud