人教版九年级物理教科书上关于流体的两个实验效果差,现象不明显,学生理解有困难。为此,笔者对这两个实验进行了改进。一、一组仪器两个结论,顺利突破液体压强的教学难点“液体压强随深度增加而增加”实验用压强计的探头伸入液体不同深度,验证深度增加压强增大效果明显,但验证压强与密度的关系时效果很差,不易观察。为此,笔者与学生一起进行了大胆创新与改进,用一组仪器同时验证了液体压强与深度和液体密度 People’s Education Edition ninth grade physical textbooks on the fluid two experimental results is poor, the phenomenon is not obvious, students have difficulty understanding. To this end, I made improvements on these two experiments. First, the two conclusions of a group of instruments, the successful breakthrough liquid pressure teaching difficult “The liquid pressure increases with depth ” The experimental pressure gauge probe into the liquid at different depths, verify the depth increases the pressure increase effect is obvious, but the verification Pressure and the relationship between the time the effect of poor, not easy to observe. To this end, the author with the students conducted a bold innovation and improvement, with a set of instruments at the same time verify the liquid pressure and depth and liquid density