教学资源分析: 《热水变凉》是苏教版《科学》四年级(上册)第二单元“冷和热”里的第1课,属于课程标准中物质世界的范畴,研究的是一杯水由热变凉的动态变化过程。 一杯热水放在桌上由热变凉,这是一个生活中司空见惯的现象,学生很少研究其中的科学道理,而本节课的目的就是引导学生对这一现象进行观察记录,收集数据, Teaching Resources Analysis: “Hot Water Cools” is the first lesson in “Cold and Heat” in the second unit of the fourth edition of the Science (the fourth volume) of the Sujiao edition. It falls into the category of the material world in the curriculum standards. The study is about a glass of water Dynamic changes from heat to cool. A cup of hot water on the table by the cool heat, which is a common phenomenon in life, students rarely study the scientific truth, but the purpose of this lesson is to guide students to observe the phenomenon of this record, to collect data,