微距摄影技术下钠的性质实验教学研究

Experimental Teaching Study on the Properties of Sodium Under Macro Photography Technology

针对钠的性质的实验教学,梳理剖析部分课例存在实验视频不清晰、中后排学生难以观察到实验现象等问题,实验可视化效果不佳导致学生无法深刻认识钠的性质,通过微距摄影及热成像的观察方式来实现实验过程和现象的可视化。在手机后置摄像头上夹上微距镜头捕获金属钠与氧气、水的反应画面,实现微距摄影功能并用“剪映”视频编辑软件按需设置“播放倍数”,加以“美丽化学”热成像视频,使用教学多媒体呈现实验现象。结果表明,实验现象直观震撼,有效帮助学生落实证据推理与科学探究核心素养,此方法具有很好的推广价值。

In view of the teaching experiment on the nature of sodium,some examples of analysis had problems such as unclear experimental videos and difficult observation of phenomena for students in the middle and back rows,and the poor visualization effect of the experiment led to students’inability to deeply understand the properties of sodium.The observation method of macro photography and thermal imaging was used to visualize the experimental process and phenomena.The macro lens clipped on the rear camera of the mobile phone captured the reaction of sodium metal with oxygen and water,realized the macro photography function,and used the“Capcut”video editing software to set the“Playback Multiple”as needed,and added the“Beautiful Chemistry”thermal imaging video,and used teaching multimedia to present the experimental phenomenon.The results showed that the experimental phenomenon was intuitive and shocking,which could effectively help students implement the core literacy of evidence reasoning and scientific inquiry,and this method had good promotion value.