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化学是一门在原子、分子水平上研究物质的组成、结构、性质及其应用的一门基础自然科学。微粒观,即从微粒出发建构的解释系统。在初中阶段微粒观的基本内涵有:物质是由分子、原子等微观粒子构成的;微粒是不停地运动着的,微粒之间有间隔,宏观与微观之间存在着联系,微观认识解释宏观现象的本质。微粒观思维,即在原子、分子水平上认识物质是化学现象本质认识的独特视角,也是建构化学科学理论的独特思维方式。本文以笔者自身的教学实践经验为例提出了几种建构微粒观的策略,希望对广大教师有所帮助。
Chemistry is a basic science that studies the composition, structure, properties and applications of matter at the atomic and molecular levels. Particle concept, that is constructed from the particle structure of the interpretation system. The basic connotation of the concept of particle in the junior middle school are: the substance is composed of micro-particles such as molecules and atoms; the particles are constantly moving and there are intervals between the particles; there is a connection between macro and micro; micro- The nature of the phenomenon. Particle thinking, that is, understanding of matter at the atomic and molecular level is a unique perspective of understanding the nature of chemical phenomena and a unique way of thinking in constructing the theory of chemical science. Based on the author’s own teaching practice, this paper presents several strategies for constructing the concept of particles, hoping to help the teachers.