The document discusses the compass needle and how it was discovered. It explains that in 1820, Oersted discovered that an electric current could deflect a compass needle, showing the link between electricity and magnetism. The compass needle functions by indicating magnetic north due to its magnetic properties. The document also provides instructions for how to make a homemade compass by magnetizing a needle and observing which way it orients when placed on a floating surface.

1. COMPASS
NEEDEL
By Oriol Colls
and Andreu Vilà

2. HOW DISCOVERED THE COMPASS
NEEDLE ?
• In 1820 Orested
discovered compass
needle that an
electric current can
deflect showing the
link between
electricity and
magnetism.

3. HOW IS HIS FUNTION ?
The compass needle is an instrument used for
guidance, and its fundamental characteristic
lies in the properties of the magnetic needle.
Its operation is due
to the needle
indicating the
magnetic north.

4. HOW IS HIS FUNTION ?
• The compass needle is an instrument used
for guidance, and its fundamental
characteristic lies in the properties of the
magnetic needle. Its operation is due to the
needle indicating the magnetic north.

5. HOW TO MAKE A COMPASS NEEDLE ?
• 1. Rub the needle or pin on the magnet always in the same direction.
• 2. Click one end of the needle or pin on a light element and floating.
You can use a small piece of Styrofoam or a stalk of a floating plant.
• 3. Place your chosen float on the water surface making sure that
the needle or pin it dry and is parallel to the water surface.
• 4. Immediately you will notice that the device will turn to sit still.
The remaining site targeted by the end of the needle or pin is
north.
• 5. To verify that your compass works turn it again and see that it
will point in the same direction: the north!

6. BIBLIOGRAPHY
We search in
internet and the
websites are:
Wikipedia,
Saberia.com.