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初中生物在初一开始,就讲到以鼠妇为例的“光对鼠妇生活的影响”对照试验问题,在这个实验中,刚进入初一的学生始终对“变量”以及在实验中如何确定变量把握不太准。下面我就上述两个问题简述一二,或许对初一新生有所启迪和帮助。一、关于变量的一些知识(一)什么是变量变量是指实验过程中所被操作的特定因素或条件。按性质不同,通常可分为两类:1.实验变量与反应变量。实验变量,也称为自变量,指实验中由实验者所操纵的因素或条件。反应变量,亦称因变量,指实
Junior high school biology at the beginning of the first to talk about the mouse as an example of “light on the life of the mouse woman ” control test problem, in this experiment, just entering the first day of the students always on the “variable” As well as how to determine the variables in the experiment is not accurate grasp. Now I briefly mentioned one or two of the above two issues, perhaps inspired and helped by the freshmen. First, some knowledge about variables (A) What is a variable Variable refers to the specific factors or conditions that are manipulated during the experiment. By nature, can be divided into two categories: 1. Experimental variables and response variables. Experimental variables, also called independent variables, refer to the factors or conditions manipulated by the experimenter in the experiment. Response variable, also known as dependent variable, refers to the real