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化学是一门以实验为基础的自然学科,化学实验是进行科学探究的重要方式,学生具备基本的化学实验技能是学习化学和进行探究活动的基础和保证.但在学生的实验活动中,存在许多操作上的问题,这样不仅影响了实验效果而且不利于学生科学探究意识的培养.九年级义务教育化学课程标准中要求学生完成的基础实验有八个,学生在实验中普遍存在问题有:实验名称氧气的实验室制取与性质存在问题(1)检查装置气密性时,先用手握住试管,后将导管伸入水中;(2)胶塞塞的不紧;(3)装药品时,直接放到试
Chemistry is an experiment-based natural subject. Chemistry experiment is an important way to conduct scientific inquiry. Students have the basic chemical experiment skills is the basis and guarantee for learning chemistry and conducting inquiry activities. However, in the experimental activities of students, Many operational problems, this not only affects the experimental results but also not conducive to the cultivation of students’ scientific inquiry consciousness.The ninth grade compulsory education chemistry curriculum standards require students to complete the basic experiment has eight, the students in the experiment ubiquitous problems are: experiment Name Laboratory oxygen preparation and nature of the problem (1) check the device air tightness, first holding the test tube by hand, after the catheter into the water; (2) rubber stopper is not tight; (3) drugs When, put directly to the test