教材内容:教科版小学科学五年级下第二单元第三课教材分析:本节课的教材内容主要包括两点:第一点是水受热时的体积膨胀、受冷时体积缩小的现象;第二点是其他许多液体受热时体积膨胀、受冷时体积缩小的现象,总的而言,便是液体的热胀冷缩现象。教学目标:一、知识目标:了解热胀冷缩的自然现象及背后的科学道理,知道水以及其他大多数液体在受热时会出现体积膨胀、受冷时会出现体积缩小的现象。二、能力目标:能够制作简单的水体积观察装置,通过 Textbook content: textbooks primary school under the second grade of science second unit Lesson analysis: textbook content of this lesson includes two main points: the first point is the volume of water when heated, the phenomenon of volume shrinks when cold; The other is the volume expansion of many other liquids when they are heated and the volume shrinkage when they are cold. In general, they are the phenomenon of thermal expansion and contraction of liquids. Teaching objectives: First, the knowledge of goals: To understand the natural phenomenon of thermal expansion and contraction and the scientific truth behind that water and most other liquids will appear in the heat when the volume expansion, the volume will be reduced by the cold phenomenon. Second, the ability of the target: to be able to make a simple water volume observation device, through