Earliest records show a spoon shaped compass made of lodestone or magnetite ore ... Often, the Big Dipper (Great Bear) was drawn within the center disc. The square symbolized earth and the circular ...

sides (SSS). To do this you will need a ruler and a compass, but not a protractor as you do not have any information about the angles. The method involves drawing arcs with a compass, from the ...

A magnetic field is invisible, but it can be detected using a magnetic compass. A compass contains a small bar magnet on a pivot so that it can rotate. The compass needle points in the direction ...