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这里向大家介绍两个简单的实验,它们可以使学生牢牢记住在所有学科中都十分重要的两个观念:第一,把握所有变量的必要性;第二,在分析数据时运用正确方法。在科学领域中,在作出任何论断之前把握住所有变量是极端重要的。我们的这个简单实验可以证人深刻地理解到,把握不住所有变量就可能得出完全错误的结论。实验装置是由不同直径的圆环组成的各种环摆,在每个环上,我们都锉出一道半圆形的凹槽作为刀形支撑物的支点(图1),这样,圆环就会绕着这个位于平均直径上的支点摆动(如虚线所示)。测量直径,然
Here I will introduce two simple experiments that will enable students to keep in mind two concepts that are important in all disciplines: first, to grasp the necessity of all variables, and second, to use the correct method when analyzing data. . In the field of science, it is extremely important to grasp all variables before making any claims. This simple experiment of ours can witness profound understanding that grasping all variables can lead to completely wrong conclusions. The experiment device is a variety of ring pendulums made up of rings of different diameters. On each ring, we pull out a semi-circular groove as the fulcrum of the knife-shaped support (Figure 1). Thus, the ring It will swing around this fulcrum on the average diameter (as shown by the dashed line). Measure diameter, then