2. Electricity flows in a closed path called a circuit. A simple electrical circuit is a system with three parts that have: 1.A source that provides electricity 2.Something that uses electricity 3.Wires to carry electricity A battery provides electricity, and has a positive(+) and negative (-) side.

3. Electricity will only move if the wires and other parts form a complete circuit. This provides a closed and continuous path for the electricity to move through. Imagine a simple circuit with a light bulb at one end and a battery at the other. The flow of electricity is continuous.

4. If this circuit is cut at any point, the electricity moving around the circuit will stop. As a result, the light bulb will have no electricity flowing through it. The bulb will go out. The wires must also be connected to each side of the battery. If both ends of the wire are connected to the same side of the battery the electricity will not move around the circuit. The bulb will receive no energy and will not light. The wires must touch both sides of the light bulb, otherwise the electricity will go around the bulb without ever going through it. The bulb will not light up.

5. For any electrical appliance to work, there must be a complete path from the power source to the appliance. When electricity runs through some materials, it makes them hot. This is used for useful appliances such as toasters and irons. Some materials become so hot with electricity that they glow. Inside a light bulb is a tiny wire, known as a filament, that glows from this heat. Special gases in the light bulb make this glow even brighter, producing light energy.

6. When electricity runs through a wire, the wire becomes magnetic. This is known as electromagnetism. The area of electromagnetism around something carrying electricity is called an electromagnetic field. Electromagnetism makes it possible for electric motors to work. Parts of the motor become magnetic, and push and pull other parts. In this way, the motor turns electrical energy into mechanical energy.

7. Materials that are good at carrying different types of energy are conductors. They conduct energy from one place to another. -Copper is a very good conductor of electricity. That is why electric wires are often made of copper. -Other materials are good conductors of sound, heat, or light energy. Materials that do not carry some forms of energy very well are insulators. Insulators can be used to block the movement of energy. - Rubber and plastic are not good conductors of electricity. This is why we use these materials to insulate electrical wires, so that we can handle them without getting burned.

9. Each circuit below has light bulbs, a battery as a source of power, and wires. 1)In which circuit will the light bulbs light up? 2) Why wont the other circuits light the bulbs up?

10. Examine the appliances, and identify what kind of energy each appliance produces. A light bulb produces what type of energy? a. heat/thermal energy b. electrical energy c. mechanical energy d. light energy

11. A toaster produces what type of energy? a. heat/thermal energy b. electrical energy c. light energy d. mechanical energy

12. A radio produces what type of energy? a. electrical energy b. mechanical energy c. sound energy d. light energy

13. A fan produces what type of energy? a. sound energy b. mechanical energy c. light energy d. electrical energy

14. Juan brushes his teeth with an electric toothbrush. Its plug has metal prongs. Why are the prongs made of metal? a) Metal doesn’t get hot. b) Metal is an insulator. c) Metal is strong. d) Metal is a conductor.

15. The diagram shows an incomplete electrical circuit. Use the diagram to answer the question. What can be done to get the light bulb to go on? a)Remove wire C b)Connect wire B to the other side of the bulb c)Join wire A to wire B d)Connect wire A to wire C

16. Describe some special characteristics of each: Electric Circuits ________________ _________________ Electromagnetism: _________________

17. Electricity flows in a closed path called a circuit. A simple electrical circuit is a system with three parts that have: -A source that provides electricity -Something that uses electricity -Wires to carry electricity Electricity will only move if the wires and other parts form a complete circuit. It must be a closed and continuous path. When electricity runs through a wire, the wire becomes magnetic. This is known as electromagnetism.

18. Materials that are good at carrying different types of energy are conductors. They conduct energy from one place to another. Copper is a good conductor of electricity. Materials that do not carry some forms of energy very well are insulators. Insulators can be used to block the movement of energy. Plastic and rubber are good insulators of electricity.