论文部分内容阅读
碳是学生连续学习的第三种非金属元素。跟前两种元素(氧、氢)不同,碳的单质是固体。因而通过本章的学习,能使学生学到一些固态非金属所特有的物理性质,同时还能学到有关固体之间的反应,溶液之间的反应,以及有机化合物的初步知识。 碳是学生比较熟悉的元素,在小学自然课、植物课和前面两章的教材里,以及日常生活中都已获得了不少有关碳的知识。例如学生已经知道空气里含有二氧化碳,碳能燃烧,动植物的呼吸都放出二氧化碳,
Carbon is the third non-metallic element of continuous learning for students. Unlike the first two elements (oxygen, hydrogen), carbon is a solid substance. Therefore, through the study of this chapter, students can learn some physical properties that are unique to solid non-metals. At the same time, they can learn about the reactions between solids, the reactions between solutions, and the preliminary knowledge of organic compounds. Carbon is an element that students are familiar with. There has been a lot of knowledge about carbon in elementary school and plant classes in primary schools, in the teaching materials in the previous two chapters, and in daily life. For example, students already know that air contains carbon dioxide, carbon can burn, and plants and animals breathe out carbon dioxide.