The first known magnets were naturally-occuring magnetic rocks called lodestones. Lodestone is composed of magnetite, an easily-magnetized solid mixture of Iron (II) oxide and Iron (III) oxide. Lodestone's magnetism is induced by the planetary magnetic field generated by the Earth's core. It was soon discovered that pieces of iron metal could be magnetized by stroking them with a lodestone.
Magnets first occurred naturally, so "before Man" would be your answer.
My answer id they have different shapes and colors.
magnets make the radishes grow larger. i noticed that the magnets also made the radishes produce more leaves.
only one... but there are difrent shapes...
The most common permanent magnets are: neodymium magnets, which are composed of neodymium, iron and boron; Samarium Cobalt magnets, which are composed of samarium, cobalt and iron; and ceramic magnets. Here is a link to information about the first 2 which are called rare earth magnets.
The ancient Greeks were the first to discover natural magnets in a region called Magnesia, which is how magnets got their name. Thales of Miletus, a Greek philosopher, is often credited with being the first to study the properties of magnets.
lodestones by h2o power bye sytilte go to first magnets use d.com
Lodestones.
magnes
lodestones
In UK.
we know because magnets were first found in 1200
People first knew about magnetite and lodestone.
Magnesia
Africans
The first known magnets were naturally-occurring rock, so they must have been made by whoever made the Earth and its rocks. Nobody was around to watch.
Michael Faraday was the first one who observed the production of electricity by moving magnets towards a coil of wire. This phenomenon is known as electromagnetic induction.