Magnetism is caused by the motion of electrons. The force
exerted by magnets when they attract or repel each other is called Magnetism. Atoms
are the tiny units that compose a substance. In each atom there are electrons
that carry electric charges. When these charges move in a spinning motion the
electrons tend to circle the core of the atom, which is the nucleus. These
movements generate electric currents that cause the electron to act like a
microscopic magnet hence causing magnetism to occur.
