一、教材分析:本课是根据九年义务教育人教版《自然》第七册“热学单元”的内容而设计的。教材中“热学单元”涉及到的内容有:液体的热胀冷缩、固体的热胀冷缩、气体的热胀冷缩、温度计及测量物体温度等部分组成,其核心内容是探究物体热胀冷缩的性质及学生学会使用温度计。温度 First, the textbook analysis: This lesson is based on nine years of compulsory education PEP “Nature” seventh book “thermal unit” content and design. Textbook “Thermal Unit” are related to the content: thermal expansion and contraction of liquid, solid thermal expansion and contraction, gas expansion and contraction, thermometer and measurement of object temperature and other components, the core content is to explore the object thermal expansion The nature of shrinking and students learn to use thermometers. temperature