观察和实验是学习与建立物理知识的基础．作为一门实验科学，初二物理围绕力学、声学、热学、光学内容共安排了演示实验６０多个，必做的学生实验１０个，课后小实验２１个． 这些实验从质疑出的问题开始，创设条件使物理现象和事实重现，通过对现象的观察、分析，归纳出物理概 Observation and experimentation are the basis for learning and establishing physical knowledge. As an experimental science, the second day of Physics has arranged more than 60 demonstration experiments around mechanics, acoustics, thermals, and optics. There are 10 necessary student experiments and 21 small experiments after class. These experiments began with questions that were questioned, creating conditions that allowed physical phenomena and facts to reappear. Through the observation and analysis of phenomena, they summarized the physical concept.