《动物和环境》一课需要准备的学生分组实验材料有——长方形扁纸盒2个、黑布、塑料薄膜、玻璃片、干土、湿土、蚯蚓若干条。准备以上材料时应注意以下问题: 一、长方形扁盒要大小适中,一般以装皮鞋的盒子为好 因为皮鞋盒既牢固又较深,牢固便于用刀子开窗户,较深可防止蚯蚓轻易爬出盒外。而且皮鞋盒大小适中,容易完成实验。因为盒子太大会拖长实验的时间,太小会影 Animals and environment The students need to prepare a group of experimental materials - rectangular flat tray 2, black cloth, plastic film, glass, dry soil, wet soil, earthworms several. The preparation of the above materials should pay attention to the following questions: First, rectangular rectangular box to moderate size, the general loading shoes box is better because the shoe box is both solid and deep, solid and easy to open a window with a knife, deep to prevent earthworms easily climbed out Outside the box. And shoes box size is moderate, easy to complete the experiment. Because the box is too long drag the experiment time is too small