【教学目标】1.抓住文章说明对象,初步学会画树状图,借助树状图理清文章顺序。2.介绍固体燃料,感知固体燃料的特点和作用,学习分类别、解释和作比较的说明方法,体会好处。3.感悟科普说明文的语言严谨、趣味的特点,体会拟人化的写法及妙处。4.借助科学材料,写一段用拟人手法介绍新型燃料的说明文字,可以用上分类别、解释和作比较等说明方法。【教学重点】1.初步学会画树状图,借助树状图理清文章顺序。 [Teaching Objectives] 1. Grasp the article description of the object, the initial learn to draw tree, with the help of the tree map to clear the order of the article. 2. Introduce solid fuels, perceive the features and functions of solid fuels, learn how to classify, interpret and compare descriptions, and benefit. 3 sentiment popular science description language rigorous, interesting features, experience anthropomorphic wording and beauty. 4. With the help of scientific material, write a paragraph describing the introduction of new fuels by anthropomorphic techniques, including sub-categories, explanations and comparisons. [Teaching focus] 1 preliminary learn to draw dendrogram, clear the order of the article with the help of dendrogram.