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Wayfinding

Early Compasses

A Magnatized Needle

During the 11th century people in China

made a compass by using wax,small iron neddle,and

a strand of silk.

They rubbed the needle with lodstone. This

permanently magnetized the needle. They discoverd the needle points north and south.

Finding Megnetic Felds

Finding magnetic fields

http://youtu.be/AMXo1iZHYz0

There are 6 diffrent steps

First, you put cooking oil into an ice cream cap. Second,put half a spoonful of iron and stir with penicl. Third, put a bar magnet under the lid then see the iron move. Then reapet steps1 and 2. Fifth, put 2 square magnets on the side. Finally, Put oil and iron again and put a flexible magnet under and see what happens.

A Magnetized Needle

Magnets Made From Different Materials

Rare earth magnets are made of rare meatls. Two examples are neodymium and samarium. Rare earth magnets are EXTREMALY powerful. If you straped large ones to your hands and feet you can climb a steel wall.

Rare Earth Magnets

Made by Sammy and Alexis

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