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近年来,问答题教学正在日益受到教师的重视。这里,仅就我们的教学实践,对这个问题浅谈一些体会。 1.分析法。即从题目提供的条件入手,应用物理知识,逐步找出所要求的结论。例如[第二册第75页练习第(1)题]在很冷的地区,为什么不用水银温度计而用酒精温度计来测量气温?解题步骤:(1)题目提供的条件:很冷的地区气温很低。(2)应用物理知识:水银的凝固点比酒精凝固点高,液体温度计是根据液体热胀冷缩的性质制成的,液体凝固后不能再测气温。
In recent years, quiz teaching has been increasingly valued by teachers. Here, just for our teaching practice, talk about some experiences on this issue. 1. Analytical method. That is, start with the conditions provided by the topic, apply physics knowledge, and gradually find the required conclusions. For example, [Page 75, Exercise No. (1)] In a very cold area, why not use an alcohol thermometer to measure the temperature with an alcohol thermometer? Problem solving procedure: (1) Title Condition provided: Very cold regional temperatures Very low. (2) Applied physics knowledge: The freezing point of mercury is higher than the freezing point of alcohol. The liquid thermometer is made according to the properties of the liquid’s thermal expansion and contraction. After the liquid is solidified, the temperature can no longer be measured.