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人教版化学必修1教材“化学计量在实验中的应用”一节中介绍了“物质的量”这一重要的物理量,它是学生进入高中阶段遇到的第一个较大的学习难点:其一,“物质的量”概念具有抽象性,它是用来表示“一定数目的粒子的集合体”这样一个物理量,不像“长度”、“质量”等物理量那样具有比较明显的意义,它离学生的日常生活经验较远,因而学生的学习难度比较大;其二,“物质的量”概念的构成具有特殊性,其“的”字结构的四字短语读之拗口、思之难解,与学生以往对“长度”、“质量”等物理量的认知过程不统一、不协调。
The PEP Chemistry compulsory 1 teaching material “Schemes in the application of experiments” section describes the “material amount ” this important physical quantity, which is the first major student encountered in the high school stage Difficulties in learning: First, the concept of “quantity of substances” is abstract, it is used to represent a “a certain number of particle aggregates” such a physical quantity, unlike “length” and “quality”. Such as physical quantity has obvious meaning. It is far from the students’ daily life experience, so the student’s learning is more difficult. Secondly, the composition of the concept of “substance quantity” has particularity. “The four-character phrase structure of the word structure is difficult to understand and difficult to understand, and it is not consistent or consistent with students’ previous cognitive processes such as ”length“ and ”quality".