一、简单的磁现象[知识要点] 1.磁体具有吸铁性和指向性磁铁具有吸引铁、钴、镍等物质的性质叫磁性.具有磁性的物体叫磁体.可以在水平面内自由转动的条形磁体或磁针,静止后总是一端指南、一端指北,磁体的这种指南北的性质叫做指向 First, the simple magnetic phenomena [Knowledge Points] 1. Magnets with iron absorption and directional magnet has attracted the properties of iron, cobalt, nickel and other substances called magnetic. With magnetic objects called magnets. Can freely rotate in the horizontal plane Shaped magnet or needle, after the static is always one end of the guide, one end refers to the north, the magnet of this guide is called the nature of the North