人教版小学自然第九册第八课《根的作用》,设计了“根有吸收水分的作用”的实验,学生在实验中,不仅发现了试管内的水量减少,而且发现了不同的植物,根的吸水量也不同。到底根的吸水量的多少与什么有关呢? 同学们争论起来,有的说:“与根的大小有关”,有的说:“与根的多少有关”,有的说:“与叶的多少有关,与根没关系”…… People's PEP Primary School Natural 9th ​​Volume 8, “the role of the root”, designed the “root has the role of water absorption” experiment, students in the experiment, not only found in the test tube to reduce the amount of water, but also found that different plants , The root of water absorption is also different. What is the amount of water absorbed by the root? What are the students arguing? Some say: “It's about the size of the root.” Some say: “How much is the root?” Some say: “How much is the leaf? Related to the root does not matter ”......