论文部分内容阅读
一、教材分析《地壳的物质组成与物质循环》选自湘教版必修一第二单元第一节,是本章的开篇,对后面章节的学习具有指导性意义。本节内容和上一章“地球的结构”中地壳和地幔的知识联系密切。本节课的重难点是地壳的物质循环,本节教材的结构由两大部分组成:一是地壳的物质组成,包括概念及不同类型岩石的特征;二是地壳物质循环,教材从地球构成的基本概念——矿石入手,介绍了岩石的概念、岩石的类
First, the analysis of teaching materials, “the material composition of the crust and material cycle” selected from the Hunan Education version of the first section of the second unit, is the opening chapter of this chapter, has a guiding significance for the study of the following chapters. This section is closely related to the knowledge of the crust and mantle in the previous chapter “Structure of the Earth.” The main difficulty of this lesson is the material circulation of the earth’s crust. The structure of the teaching materials in this section consists of two major components: one is the material composition of the earth’s crust, including concepts and characteristics of different types of rocks; the other is the crust material circulation, and the teaching material is constructed from the earth. The basic concept - starting with ore, introduced the concept of rock, the type of rock