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【制作说明】该教具是为教学教科版科学五年级上册第二单元第6课“怎样获得更多的光和热”而制作的教学仪器。以往教学中经常会出现的问题:教师和学生完成纸袋的制作几乎需要1节课的时间;学生做的纸袋很难保证每个都一样,纸张的厚薄、纸袋的大小、用胶水的多少、纸袋口的大小都会影响到实验效果;利用太阳光来做实验,需要对天气有更高要求,但天气千变万化,很难保证光线持续10分钟,有时一连几天都没有太阳光,实验
【Teaching Instructions】 The teaching aids for the teaching of science fifth edition of the second unit of the sixth unit “How to get more light and heat ” and the production of teaching equipment. Past problems often occur in teaching: teachers and students to complete the production of paper bags require almost 1 class time; students make it difficult to ensure that each is the same paper bag, paper thickness, the size of the paper bag, the amount of glue, paper bags The size of the mouth will affect the experimental results; the use of sunlight to experiment, the need for the weather have higher requirements, but the ever-changing weather, it is difficult to ensure that the light lasts 10 minutes, sometimes for days without sunlight, the experiment