3. Magnetic Field Lines Equipment: Bar magnets , iron filings in kerosene sealed in a flat, plastic container. Place a permanent bar magnet on the filings container. The needle shaped iron filings should orient themselves along the magnetic field lines so you can create an image of the magnetic field around the magnet. Sketch the magnetic field lines. Compare your sketch to the electric field lines around an electric dipole. 4. Breaking Apart a Magnet Equipment: Six to eight small disc magnets, two bar magnets, pieces of iron or steel. Investigate the small disc magnets. a) Does each appear to have both a “North” and a “South” pole? Explain how your observations reveal this. Assemble the disc magnets into a stack. Investigate the behavior of the stack of magnets compared to the single bar magnet. b) How does the stack behave compared to a single bar magnet? Does it have a “North” and “South” pole?