小学科学(苏教版)四年级(上册)第一单元第三课《空气影响物体的运动》一课中,有研究空气阻碍小车运动跟“车厢”的形状有关这一实验。这是一组对比实验,要求学生研究三种不同的“车厢”在运行中受空气阻碍的情况(第一种是将纸板竖直固定在车头(如图1);第二种是将纸板一端弯曲成 Primary Science (Su Jianban) fourth grade (Volume) the first unit of the third class “air-influenced objects movement” in a class, there are studies of air-hinder the car movement with the “car” shape related to this experiment. This is a set of comparative experiments that require students to study the air obstruction of three different “carriages” during operation (the first one is to fix the cardboard vertically to the front of the car (Figure 1); the second is to place one end of the cardboard Bent into