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What Is an Electrical Discharge?What Is an Electrical Discharge?
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When you walk on a rug, static electricity builds up on your shoes. The charge keeps building until you touch something. Then – zap! It suddenly moves onto the object. This movement of charge is called discharge (DIS·charj). You might feel this discharge as a small shock. It can feel painful to some people.
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Static electricity doesn’t discharge into all types of materials because electricity flows only where it can. It flows easily through materials called conductors (kuhn·DUK·tuhrz). An insulator (IN·suh·lay·tuhr) is a material through which electricity does not flow.
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What types of materials do you think are good conductors? Metals are very good conductors. That is why you might feel a shock when you touch a doorknob. The static electricity on your shoes travels through your body, to your hand, and then into the doorknob.
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Insulators Conductors
Wood Metal
Air Water
Rubber
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Fact and OpinionFact and Opinion
• Write a statement of fact from the passage. How could you prove it true or false?
• Write a statement of opinion. Is the statement of opinion valid? How do you know?
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What types of materials can What types of materials can electricity easily discharge into?electricity easily discharge into?
• Answer the question…– With a partner– In your Learning Notebook
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dischargedischarge
• The sudden movement of an electric charge from the object where it built up onto another nearby object.
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conductorconductor
• A material through which heat or electricity flows easily.
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insulatorinsulator
• A material through which heat or electricity does not flow easily.
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