Fun Electricity             closed                open
            circuit                                               circuit
                                     It  is a full                    It is  not a
                                     circle that                     full circle
                   means the                     that  means
                   the light is on.              the light is on.
 
            Conductor                           Thermal
          It is metal and it                    It makes heat
          passes through.                   in the light bulb.
 
            Resistor                             Insulator
                 It slows the                          It is plastic
        electricity.                           and  rubber
                                                    and  it  can't
                                                    pass through