1. What provides energy in an electric cir- d. battery a. switch b. light bulb C wire 2. This is an electrical tool that helps open and close a circuit a light bulb b. switch c. insulator d wire 3. What is needed by appliances to work? a machine b. sun c. electricity d. air 4. The continuous flow of electrons in a cir- cuit a static electricity b. continuous electricity c. current electricity d. conduct electricity 5. Which of these could be used as a regula- tor in a circuit? a ballpen c. rubber eraser d. electric motor b. Gas engine
