1. Electricity Week 5
Ask for what students know about electricity

2. What is Electricity Electricity: the flow of electric charges
The steady flow of electricity is called an electrical current and moves in a circuit.
Talk about a few devices that need electricity; what happens when they unplug

3. Circuits
Open Circuit: A broken path that does not allow electricity to flow
Closed Circuit: A closed path that allows electricity to flow
Circuit means to “go around”
Discuss what occurs when a light bulb burns out (filament disconnects => open circuit)
Ask for other examples

5. The Battery
Battery: a device that generates electricity by combining certain chemicals
The battery is the power source of a circuit.
A stack of electrical cells creates a battery.
What chemically happens when batteries run out? Positive and negative ends of batteries

6. Conductor
Conductor: Material that allows electricity to pass through easily
Metals are good examples of conductors.
Discuss wires (copper, silver, gold)

7. Insulator
Insulator: Material that does not allow electricity to pass through easily
An example of an insulator is plastic.
Discuss rubber/plastic insulation on wires. Electric shocks

8. Resistor
Resistor: a material that resists, but doesn’t stop the flow of current.
A material that resists has resistance.
Resistance: a material’s opposition to the flow of electricity
Talk about how power lines need to be large in order to prevent electricity loss
Discuss how all electricity loses voltage over distance