一、教材分析1.教材的作用和地位磁场和磁感线是两个很抽象的概念.本节是对上一节《简单的磁现象》的进一步延伸,是在学习了磁极、磁铁的吸铁性、指向性及磁化等知识的基础上学习本节的;同时又是学习电流的磁场、通电螺线管、电磁铁等知识以及升入高中继续学习电磁学知识的重要基础,所以本节起着承前启后的纽带作用.从研究方法看,本节包含两种物理研究方法:一是认识磁场存在时采用了 First, the textbook analysis 1. The role of teaching materials and status Magnetic field and magnetic lines are two very abstract concepts.This section is a further extension of the previous section, “a simple magnetic phenomenon,” is to learn the magnetic pole, magnet suction Iron, orientation and magnetization knowledge based on the study of this section; at the same time is to learn the current magnetic field, the solenoid, electromagnet and other knowledge and into the high school continue to learn the important basis of electromagnetic knowledge, so this section Play a preconceived role in the link from the perspective of research methods, this section contains two kinds of physical research methods: First, to recognize the existence of a magnetic field