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从去年上半年开始,我们在初中二年级学生中开展了撰写生物科学实验观察报告的活动.事实证明:开展这项活动对激发学生的学习兴趣、培养学生的能力很有帮助,是培养学生能力的一种有效途径. 开始,我们只是在课外活动小组中开展了这项活动.但是,一个同学的观察过程给了我们新的启发.她在饲养小蝌蚪的过程中想到:既然蝌蚪和鱼的形态构造相似,那么蝌蚪的尾巴是否也象鱼一样地起到尾鳍的作用呢?于是她就做了一个剪掉蝌蚪尾巴的试验.当她把剪掉了尾巴的蝌蚪放到水里后,许多小蝌蚪都来咬它,最后把它咬死了…….她看得入神了.她想:剪去尾巴的小蝌蚪多可怜啊!为什么它的同伙都咬它呢?啊!可能是小蝌蚪被剪去尾巴之后所散发的物质或气味起的作用吧?于是,
Starting from the first half of last year, we conducted an activity to write a bioscience experimental observation report in the second grade of junior high school students. It turns out that carrying out this activity is very helpful in stimulating students ’interest in learning and in cultivating students’ abilities, We started this activity with a group of extracurricular activities, but the observation of a classmate gave us a new inspiration, and in the process of raising a small tadpole she came up with the idea that since tadpoles and fish If the tweezers tweezers tweezers, the tail of the tadpole acts like a tail in the form of a fish, so she made a test to cut the tail of the tadpole Small tadpoles have to bite it, and finally bite it dead ... ... She was fatigued She thought: cut tails tadpoles miserable ah! Why its associates bite it? Ah! May be a small tadpole After being cut off the tail of the material or smell issued play a role, right? So,