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人教版九年级化学共12个单元,《身边的化学物质》内容占了7个单元,在初三化学复习中份量最大,知识点最多,在中考试卷内容的结构中约占42%,地位是相当重要。身边的化学物质包括(一)我们周围的空气、(二)水与常见的溶液、(三)金属与金属矿物、(四)生活中常见的化合物。一般在复习这部分知识时所面临的困难是因为化学物质多和性质多导致记忆困难等。有效地复习要使学生巩固和掌握所学的知识技能,使知识系统化、网络化;还能及时反馈,进行补救教学,弥补学生
PEP 9 grade chemistry a total of 12 units, “around the chemical substance” content accounted for 7 units, in the third chemical review of the largest share, the most knowledge points, in the structure of the examination paper content of about 42% of the structure, status It is quite important. Chemicals around us include (a) air around us, (b) water and common solutions, (c) metals and metal minerals, and (iv) compounds commonly found in our lives. The general difficulty in reviewing this part of knowledge is the difficulty of memory due to the large amount and nature of the chemicals. Effective review to enable students to consolidate and master the knowledge and skills learned to make knowledge systematic and networked; but also timely feedback, remedial teaching to make up for students