Magnets and electromagnets are represented in a concept map that shows magnetic and non-magnetic substances, poles, and the properties of attraction and repulsion between poles. An electromagnet is produced by running an electric current through a coil of wire and can be made stronger by wrapping more coils, adding an iron core, or increasing the current. Magnetic field lines are depicted and show the direction and strength of magnetic fields.

1. Magnets and electromagnets concept mapFor the teacher – first slide shows the whole concept map the second slide shows a developing map to be used in teaching the ideas contained in the map.

2. Iron, steel and nickelWood, plasticMagnetsnot attractedattractedexamplesexampleshave oppositeMagnetic substancesNon magnetic substancesPolesNorthSouthcan beorElectromagnetslike polesopposite polesRepelAttractMagnetic field lines are close togetherProduced byElectric current in wireMagnetic fieldsIn strong fieldIncrease strength byShown byThese show:1.Wrap wire into coils (solenoid)2.Use iron core inside coils3.Use stronger currentMagnetic field linesDirection in which N pole of magnet will pointIn weak fieldMagnetic field lines are far apart

3. Iron, steel and nickelWood, plasticMagnetsnot attractedattractedexamplesexampleshave oppositeMagnetic substancesNon magnetic substancesPolesNorthSouthcan beorElectromagnetslike polesopposite polesRepelAttractMagnetic field lines are close togetherProduced byElectric current in wireMagnetic fieldsIn strong fieldIncrease strength byShown byThese show:1.Wrap wire into coils (solenoid)2.Use iron core inside coils3.Use stronger currentMagnetic field linesDirection in which N pole of magnet will pointIn weak fieldMagnetic field lines are far apart