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4.3 Force, Motion, and Energy What creates an electric current? 4.3 4.3 What is a circuit? A circuit is the pathway taken by electric current. 4.3 4.3 What do closed circuits do? 4.3 Closed circuits allow the movement of electrical energy. 4.3 What do open circuits do? 4.3 Open circuits prevent the flow of electrical movement. 4.3 What are conductors? 4.3 A continuous flow of negative charges (electrons) creates an electric current. Conductors are materials that allow the flow of electrical energy. (metals) 4.3 4.3 Force, Motion, and Energy What are insulators? 4.3 4.3 What is a series circuit? 4.3 A series circuit has only one pathway for the current. 4.3 What is a parallel circuit? 4.3 A parallel circuit has two or more pathways for the electrical current to run through. 4.3 What is static electricity? Static electricity is created when certain materials are rubbed together. 4.3 4.3 What is lightning? 4.3 Insulators prevent the flow of electrical energy. (rubber, plastic, wood) Lightning is the discharge of static electricity in the atmosphere. 4.3 4.3 Force, Motion, and Energy Electrical energy can be transformed into light, or motion, and can produce thermal energy. What can electrical energy be transformed into? 4.3 4.3 Magnetic metals are ironbearing metals that attract each other. What are magnetic metals? 4.3 4.3 What is the magnetic force? 4.3 The magnetic force is the line of force that extends from the poles of a magnet in an arched pattern. 4.3 What creates a magnetic field? 4.3 Electric current creates a magnetic field. 4.3 What creates an electric current? 4.3 A moving magnetic field creates an electric current. 4.3 4.3 Force, Motion, and Energy What does a current flowing through a wire create? 4.3 A current flowing through a wire creates a magnetic field. 4.3 How can you make a magnetic field? 4.3 You can make a magnetic field by wrapping a wire around an iron nail and creating a closed circuit. 4.3 What did Benjamin Franklin discover? He discovered electricity in the atmosphere. 4.3 4.3 What did Michael Faraday discover? 4.3 4.3 What did Thomas Edison discover? 4.3 He discovered the electromagnet. He discovered the light bulb. 4.3 4.3 Force, Motion, and Energy What is an electromagnet? 4.3 An electromagnet is an arrangement of wire wrapped around a core, producing a temporary magnet. 4.3