有关声的概念比较广泛,包括声音、超声波、次声波等。而声音的概念相对而言要窄得多,它仅指人耳能感觉到的那部分声,声是生活中常见的现象。学生的感性素材多,可动手操作的活动多,但声的利用尤其是声与能量对学生来说就相对困难。针对这一问题,笔者设计并录制了一段微课,经过课堂实践,学生反映情况较好,现将该微课制作思路及内容做一简单介绍。一、声波传递能量把一块石头扔进水里,可以看到一圈一圈的波纹 The concept of sound is more extensive, including sound, ultrasound, infrasound and so on. The concept of sound is relatively narrower, referring only to the part of the human ear can feel the sound is a common phenomenon in life. Students have more emotional material and more hands-on activities, but the use of sound, especially sound and energy, is relatively difficult for students. In response to this problem, I designed and recorded a period of micro-class, after class practice, the students reflect the situation is better, now the micro-class production ideas and content to make a brief introduction. First, the sonic energy transfer A stone thrown into the water, you can see the circle around the ripples