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一道精巧而又有指导和启迪作用的化学题目,可以诱人深思,使人解而不厌,解后余味无穷,记忆尤深。如果题目都是“什么叫……?”或“为什么……?”之类,必然会使学生感到枯燥无味,而且解答后收效甚微。如问:“什么叫溶解度?”这种问题只能是要学生把溶解度的定义抄写一遍,不可能达到深刻理解和灵活运用的目的。若改问成:“溶解度定义中有哪几个关键性内涵?分别举例说明这几个关键性内涵是缺一不可的。”这样发问,既能诱发学生的解题兴趣,又能引导学生去认真地分析和探求问题。收效显然要好得多。
An ingenious and instructive and enlightening chemistry topic can be tempting, thoughtful, and reminiscent, with deep memory. If the questions are “What is ...??” or “Why...??” and the like, it will inevitably make the students feel boring, and the answer will have little effect. Such as: “What is the solubility?” This problem can only be a student to copy the definition of solubility, it is impossible to achieve a profound understanding and flexible use of the purpose. If you ask: “What are the key connotations in the definition of ”solubility?“ These examples illustrate that these key connotations are indispensable. ” This question will not only evoke students’ interest in solving problems, but also guide them. Students will seriously analyze and search for problems. The effect is obviously much better.