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一、讲清概念中关键的字和词为了深刻领会概念的含义,教师不仅要注意对概念论述时用词的严密性和准确性,同时还要及时纠正某些用词不当及概念认识上的错误,这样做有利于培养学生严密的逻辑思维习惯。例如,在讲“单质”与“化合物”这两个概念时,一定要强调概念中的“纯净物”三个字。因为单质或化合物首先应是一种纯净物,即是由一种物质组成的,然后再根据它们组成元素种
First, to clarify the concept of the key words and words In order to profoundly understand the meaning of the concept, teachers not only pay attention to the concept of the strictness and accuracy of the discourse, but also promptly correct some inappropriate words and conceptual understanding Wrong, doing so is conducive to cultivating students close logical thinking habits. For example, when we talk about the concepts of “simple substance” and “compound”, we must emphasize the word “pure thing” in the concept. Because a simple substance or compound should first be a pure substance, that is, composed of a substance, and then according to their composition of species