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2 物态变化这是教科书的第三章,共五节,依次是《蒸发》、《沸腾》、《液化》、《熔化和凝固》、《升华和凝华》。这一章的特点是贴近学生生活,且小学自然课中这些内容都有所涉及,学生有较丰厚的感性知识,所以学起来兴趣很浓。相应地在教学中应注意充分发挥学生的主动性,使教学过程生动活泼地逐步深入。这套教材在结构上与传统教材有所不同,传统教材是把《熔解(化)和凝固》放在第一节,而这套教材是把《蒸发》、《沸腾》放在前面,过去的教材从学科本身的知识结构考虑较多而对教学结构、学习结构
2 The change of state This is the third chapter of the textbook, a total of five sections, followed by “evaporation”, “boiling”, “liquefaction”, “melting and solidifying”, “sublimation and desublimation”. The characteristics of this chapter are close to the student’s life, and these topics are all covered in the natural lesson of primary school. Students have more sensible knowledge, so they have a strong interest in learning. Correspondingly, attention should be paid to the initiative of the students in teaching, and the teaching process should be gradually deepened in a lively manner. This set of textbooks is different in structure from traditional textbooks. In traditional textbooks, “melting” and coagulation are placed in the first section, and this set of textbooks is preceded by “evaporation” and “boiling”. The teaching material considers more from the knowledge structure of the discipline itself, and it has a structure and structure of learning.