OCR Text |
Show The Magnetic Poles The action of the compass needle is accounted for by considering the earth as a huge magnet, with one of its poles, the North magnetic pole, not very far from the North pole and the other, the South magnetic mag-netic pole, not far from the South pole. The North magnetic pole attracts at-tracts the north-seeking pole of the compass, which is magnetized One explanation .given for the esrth's magnetism is that this is due to electrical currents caused by daily j heating of the earth's surface. |