物理是一门以实验为基础的学科,实验在教学中有着重要的地位,它既是物理教学的基础,也是物理教学的内容、方法、手段。因而中学物理教科书上安排了很多实验,特别是演示实验,然而不是所有学校的实验教具都准备齐全,且有的年久失修,已经不能正常使用了,有的仪器结构复杂,操作繁琐,导致现象不是很直观明了,这就要求教师在实际教学中去发现和改造身边的材料。一、由一次公开课想到利用生活材料演示实验 Physics is an experiment-based discipline. Experiments play an important role in teaching. It is not only the basis of physics teaching but also the content, method and means of physics teaching. As a result, a large number of experiments were arranged in the textbooks for secondary school physics, in particular, demonstration experiments. However, not all experimental teaching aids in schools were well prepared and some were disrepair. They were no longer used properly. Some instruments were complicated in structure and cumbersome in operation. Not very intuitive and clear, which requires teachers to find and reform in the actual teaching around the material. First, by an open class think of the use of living materials demonstration experiment