《义务教育化学课程标准(2011年版)》(以下简称“新版课标”)在原课标的基础上,从学生身心发展的特点和需要出发,对课程内容的难度、容量以及部分内容条目的学习要求作了调整,目的是在不影响落实以科学素养培养为宗旨的课程目标前提下,切实减轻学生的学业负担,促进学生身心的健康发展。学生的学业负担指学生个体在吸纳、加工知识和经验以认识和适应生存环境的过程中,对目标、任务等所带来的学习压力的一种体验,以及为此而 On the basis of the original course standard, from the characteristics and needs of students’ physical and mental development, the compulsory education chemistry curriculum standard (2011 edition) (hereinafter referred to as “the new curriculum standard”), the difficulty of the course content, the capacity and some content items The study requirements have been adjusted so as to reduce the academic burden on students and promote the healthy development of students’ mind and body under the premise of not affecting the implementation of the goal of scientific literacy cultivation. Students’ academic burden refers to an individual’s experience of learning pressure caused by goals, tasks, etc. in the process of absorbing, processing knowledge and experience to recognize and adapt to the living environment, and for this reason