现行的九年义务教育教材把实验教学提到了首位,通过大量的实验(包括学生分组演示实验、自制小实验等),增强了学生的学习兴趣,逐渐培养学生的实验动手能力和观察能力,将抽象的物理概念、定义、定理、定律给以活化。笔者在多年的教学中,注重积累和总结,把书中一些现象相同或相似 The current nine-year compulsory education textbook has brought experimental teaching to the top of the list. Through a large number of experiments (including group demonstration experiments and self-made small experiments), students 'interest in learning is enhanced and students' hands-on and observational skills are gradually cultivated. Abstract physical concepts, definitions, theorems, laws to be activated. The author in many years of teaching, focusing on the accumulation and conclusion, the book some of the same or similar phenomenon