Sophia IST Opicina

Thursday, February 01, 2007




Science entry: MAGNETS
The names ''magnet'' and ''magnetism'' come from Magnesia. Magnesia is in Greece and it's an important city, because 2000 years ago, people living there discovered an unusual rock. The rock attracted materials that contained iron. It contained a mineral called magnetite.
Magnetism is the attraction of a magnet for another object. All magnets have two ends: North and South pole. Opposite poles attract eachother, alike poles repel or reject.

The region of magnetic force around a magnet is called a magnetic field. Magnetic field lines spread out from one pole, curve around the magnet and return to the other pole.

The center (or brain) of every atom is called a nucleus.

Protons are nuclear particles that carry positive charge.

Electrons are nuclear particles that carry negative charge.

To make a magnet, you must aline the object's magnetic domains. To destroy a magnet, you can boil it or through it on the ground, separating the magnetic domains...

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