九年级学生已经有了较为丰富的科学知识的接触和生活经验的积累.思维能力也在各种知识的积累和能力的训练中得到开发.从心理学角度看,九年级学生将感官材料加以吸取后,通过趋向更为复杂的思辨过程,尝试着把直观的、感知即得的感性知识转化为抽象的、推理而得的理论知识.这个加工过程较为复杂,是人类大脑理论思维能力自我提升的过程,是人类大脑自我开发的必然过程.九年级正是这样一个过渡时期的初期,化学学科正是这样一种兼具理论知识的特征和典型的丰富感性材料的接触的一门 The ninth grader already has a wealth of contact with scientific knowledge and accumulation of life experience.Development of thinking ability is also accumulated in a variety of knowledge and ability training.From the psychological point of view, the ninth grade students to sensory materials to be drawn After that, through the more complex speculative process, we try to turn the intuitive and perceptual knowledge into abstract and reasoned theoretical knowledge.This process is complicated, which is the self-improvement of human brain’s theoretical thinking ability Process, is the inevitable process of self-development of the human brain.Ninth grade is such an early transitional period, chemistry is such a combination of the characteristics of both theoretical knowledge and typical rich sensory material contact