一、考点分析1.分子热运动.(1)物质由分子组成;(2)一切物质的分子都在不停息地做无规则运动;(3)分子间存在相互作用的引力和斥力.知识拓展:(1)扩散:不同物质相互接触,彼此进入对方的现象.扩散现象说明:一切物质的分子都在不停地做无规则的运动.还说明了分子之间有间隙.(2)热运动:由于分子的运动跟温度有关,所以把分子的无规则运动叫热运动.温度越高,分子的热运动越剧烈.(3)分子间的作用力:分子间有引力.引力 First, the test center analysis 1. Molecular heat movement. (1) the material from the molecules; (2) all the material molecules are non-stop doing random movements; (3) there is interaction between the molecules of gravity and repulsion. : (1) Diffusion: the phenomenon in which different substances contact each other and enter each other’s territory Diffusion phenomenon shows that all material elements are constantly making irregular movements, and there is a gap between molecules. : Since molecular movement is related to temperature, the random movement of molecules is called hot movement. The higher the temperature, the more intense the thermal movement of molecules. (3) The intermolecular force: intermolecular attraction.