秋天到了,在一个晴朗的秋日里,我们带着学生到临山公园秋游,到了山上,同学们都兴奋地欢呼起来,这时一阵秋风吹来,红的、黄的树叶纷纷飘落下来,同学们抬起头看了看,原来是山上的杨树、槐树和一些矮灌木的叶子在脱落。 看到这种情形,有几个好发现问题的学生问到:“老师,我们自然课本中不是讲植物所需的养料绝大部分是由绿叶制造的吗?现在树叶为什么落了?树叶落了树不就会因缺少养料而死吗?到了春天为什么又会发芽?” Autumn arrived, on a clear autumn day, we took the students to the autumn tour of Linshan Park, to the mountains, the students are excited to cheer up, then a while autumn wind, red, yellow leaves have fallen down, students They looked up and looked, the original is the mountain poplar, Ash and some dwarf shrub leaves fall off. Seeing this situation, there are several students who are good at problem-finding: "Teacher, is not it in our natural textbook that the vast majority of the nutrients needed by plants are made from green leaves? Now why do the leaves fall? The leaves fall Will the tree die because of lack of nourishment? Why spring?