污染物去哪儿了?你知道吗?因为水循环运动,放在流域里的东西很可能会随水循环进入我们的水源。因此,保护流域和保护水源一样重要。但是,流域很容易受到污染,你知道这是为什么吗?我们来做个实验模拟一下。你需要:平底托盘,泥土,量杯,水,五彩纸屑。第一步:在平底托盘正中央用泥土堆一座“山”。第二步:把五彩纸屑撒在“山”上。第三步:用量杯接水并慢慢地从“山顶”往下倒水。第四步:观察,发生了什么? Where do the pollutants go? Did you know that because of the water cycle, what is in the catchment is likely to circulate with water into our water. Therefore, protecting the watershed is as important as protecting the water. However, the basin is very susceptible to pollution. Do you know why this is the case? Let’s experiment with it. You need: flat-bottomed tray, earth, measuring cup, water, confetti. The first step: in the middle of flat-bottomed pallets with a pile of soil “mountain ”. The second step: the confetti scattered in the “mountain” on. The third step: the amount of water cup and slowly from the “Peak” down into the water. Step four: observe, what happened?