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培养学生观察和动手实验的能力,不应停留在计划上,局限于课堂里,而要见诸于平时的实践活动中,只有让他们亲自去做,才能奏效,本文就这方面的一些做法予以介绍。一、家庭小实验一些取材容易,实验步骤简单,针对性强的实验可让学生在家里完成。学过平面镜成象后,布置以下几个实验观察作业题,至于理论证明可让学生自行完成,亦可在课上讲解,实验方法可让学生自由选择,最后组织交流。 1.应用平面镜成象特点估测大衣镜的厚度。 2.利用自己的身高,在大衣镜中观察,要看到自己的全身象至少要多长的镜面? 3.当人远离平面镜时,他的象将( )
The ability to cultivate students’ observation and hands-on experimentation should not be limited to the plan, but limited to the classroom, but should be seen in the usual practice activities. Only by allowing them to do it personally can it be effective. This article will be based on some practices in this area. Introduction. First, the small family experiment is easy to draw, the experiment steps are simple, and the highly-targeted experiments allow students to complete at home. After learning the image of the plane mirror, arrange the following several experimental observation tasks. As for the theoretical proof, students can complete it on their own, or they can explain it in class. The experimental methods can allow students to choose freely, and finally organize exchanges. 1. Estimate the thickness of the coat mirror using the imaging characteristics of the plane mirror. 2. Use your height to observe in a coat mirror, to see how long your body mirror should be at least? 3. When a person moves away from the plane mirror, his image will be ()