“不同土壤的渗水能力不同”实验是一个对比实验,目的是让学生通过实验探究过程,比较沙质土、黏质土、壤土的渗水能力。在教材中,活动是这样设计的:把同样多的这三种土壤分别装在三个带漏孔的容器里,然后同时倒入同样 “Different soil seepage ability is different ” Experiment is a comparative experiment, the purpose is to enable students to explore the process through experiments to compare the sandy soil, clay soil, loam seepage capacity. In the textbook, the activity is designed such that the same amount of these three soils are packed in three loosely packed containers, and then poured into the same