论文部分内容阅读
一、从学习过程中来在上教版九年级化学教材中,教师的课堂演示实验大约有33个,学生实验大约有40个,探究与实践有8个;还有一些联系实际的实验习题、趣味实验和家庭小实验等,这些实验是探究实验课题的重要来源。在学习物质组成、结构和性质、物质分离、提纯、鉴别等过程中有许多的疑难问题,为了解决这些疑难问题,我们可以设计一些化学探究性实验。这些探究性化学实验以问题和矛盾入手,使学生产生强烈的认知冲突,从而激发学生学习化学的兴趣。在教学中应充分考虑学生的实际能力,坚持自主性和启发
First, from the learning process to teach the text version of the ninth grade chemistry textbooks, teachers demonstrate about 33 classroom demonstrations, about 40 students experiment, exploration and practice of 8; there are some practical experiments linked exercises, Fun experiments and home experiments, etc. These experiments are important sources for exploring experimental topics. There are many difficult problems in the process of learning material composition, structure and property, material separation, purification and identification. In order to solve these difficult problems, we can design some chemical inquiry experiments. These inquiring chemistry experiments begin with problems and contradictions, causing students to have a strong cognitive conflict, thus stimulating students’ interest in learning chemistry. In teaching should give full consideration to the actual ability of students, adhere to the autonomy and inspiration