“金属为什么会导电呢?”“金属一般都是固体,而水银为什么不是呢?”“我还想知道金属都会生锈吗?”“有些食品里含铁,我们要不要吃铁呢?”探究活动始于问题,在科学教学中我们提倡让学生自己提出问题,尤其鼓励学生提出好问题。而当孩子们提出这样或那样的问题时,如果老师只是草 “Why does metal conduct electricity?” “Metals are generally solid, and why isn’t mercury?” “I also want to know if the metal will rust?” “Some foods contain iron, do we want to eat iron?” Activities began with problems. In science teaching we advocate asking students to ask questions themselves, and in particular encourage students to ask good questions. And when the children ask this or that question, if the teacher is only