实验操作是小学科学探究的重要环节,也是小学生获取抽象科学知识的主要途径之一。它在帮助学生获得问题答案的同时,能带给学生乐趣、顿悟以及新的问题和新的思考。因此,科学课非常受学生的喜爱,尤其是可以让他们亲自动手操作的实验课,更能点燃他们学习的激情。然而,由于教材编写、地区差异、仪器配备以及执教者的教学设计等问题,不少实验现象很难达到预设的效果。所谓工 Experimental operation is an important part of primary science inquiry, as well as one of the primary ways for pupils to acquire abstract scientific knowledge. It helps students gain the answers to questions and at the same time brings students fun, insight, new problems and new thinking. Therefore, the science class is very much loved by students, especially the experimental classes that allow them to do it themselves, and can even ignite their passion for learning. However, many experimental phenomena are difficult to achieve the desired result due to problems in compiling teaching materials, regional differences, equipment, and teaching design of coaches. The so-called workers