CK-12 Foundation
Ck 12: Physical Science: Ferromagnetic Material
[Free Registration/Login may be required to access all resource tools.] Explores what makes a material magnetic, ferromagnetic materials and how they can be magnetised, temporary and permanent magnets, and the mineral magnetite.
CK-12 Foundation
Ck 12: Physical Science: Electromagnet
[Free Registration/Login may be required to access all resource tools.] Explores what an electromagnet is, its strength, and how it can easily be turned on and off.
CK-12 Foundation
Ck 12: Physical Science: Electromagnetic Devices
[Free Registration/Login may be required to access all resource tools.] Describes electromagnetic devices and how they work.
CK-12 Foundation
Ck 12: Plix: Bar Magnet Magic: Ferromagnetic Material
[Free Registration/Login Required] Explore how magnets affect objects by dragging the bar magnet around and observing how the field lines within each area of the material change.