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[背景分析]《二氧化碳》这节内容是华师大版科学七年级下册第二章空气中的一节重要的内容,二氧化碳是一种重要的物质,它是大气中的重要成分,是光合作用的重要原料,是碳酸盐鉴定的重要依据,是自然界碳循环的主要转化物质,教材以二氧化碳的用途为切入口,引向对其物理性质和化学性质的学习。本节教材实验较多,对二氧化碳性质的讲解均是
[Background Analysis] “Carbon dioxide” This section is an important part of the second chapter air in the second edition of Science Yearbook of China Normal University, carbon dioxide is an important substance, it is an important component of the atmosphere, is photosynthesis Important raw materials for the role of carbonate identification is an important basis for the carbon cycle in nature is the main conversion material, the use of carbon dioxide teaching materials for the entrance, leading to its physical and chemical properties of learning. This textbook experiment more, explain the nature of carbon dioxide are