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以前,我总认为根只有固定植物的作用。直到前几天学了《根的作用》这篇自然科学短文后,我豁然开朗。原来根不但能固定植物,还能帮植物汲取水分和养料。课后我一直在想:怎样才能证明根有吸收水分的作用呢?要是能亲眼目睹这一过程,我的心就更踏实了。对了,为何不做个实验来证明呢?说干就干。放学回到家,我找来一株有根的小植物,把它放在—个装了八分水的烧杯里。然后在烧杯外壁的水面处做个记号。过了好些
In the past, I always thought that the root only fixed the role of plants. Only a few days ago learned the role of the root of this natural science essay, I suddenly see the light. The original roots not only fixed plants, but also help plants absorb moisture and nutrients. After class I was wondering: How can we prove that root has the function of absorbing moisture? If we can witness this process, my heart will be more practical. Yes, why not do a experiment to prove it? After returning home from school, I got a small rooted plant and put it in a beaker with eight points of water. Then make a mark on the surface of the outer wall of the beaker. After a bit better