2. Review Name the four parts of a circuit What material is the wire made out of? Would the circuit work if the wire was made out of plastic? © LoveLearning 2014

3. Conductors A conductor is a material through which electric charges can easily flow © LoveLearning 2014

4. Conductors Many of the wires in your homes are made of copper or aluminum – They CONDUCT electricity – Of all metals, silver is the best conductor, but it costs more than copper or aluminum © LoveLearning 2014

5. Conductors Conductors are made of atoms that hold their electrons loosely – That way, electrons can move easily from atom to atom © LoveLearning 2014

6. Examples of Conductors *Conductors also refer to sound and heat* Copper Iron Gold Water Aluminum Steel silver © LoveLearning 2014

7. Insulators An insulator is a material through which an electric charge cannot easily flow © LoveLearning 2014

8. Insulators Copper wires are usually coated with plastic or rubber – This coating is an insulator, making it safe to touch – Most electrical power lines do not have insulation around them Workers have to use insulated tools If you see a fallen power line, tell an adult. DO NOT TOUCH IT! © LoveLearning 2014

9. Insulators Insulators have atoms that hold the electrons tightly – A charge barely moves through an insulator © LoveLearning 2014

10. Examples of Insulators Most plastics Glass Cloth Sand Rubber Wood Dry air © LoveLearning 2014

12. Conductors and Insulators http://www.bbc.co.uk/schools/scienceclips/ag es/8_9/circuits_conductors_fs.shtml http://www.bbc.co.uk/schools/scienceclips/ag es/8_9/circuits_conductors_fs.shtml http://www.bbc.co.uk/bitesize/ks2/science/ph ysical_processes/circuits_conductors/play/ http://www.bbc.co.uk/bitesize/ks2/science/ph ysical_processes/circuits_conductors/play/ © LoveLearning 2014

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