一、当量筒用——测量精确、操作简便1.实验器材和实验方法存在的问题五年级下册《沉和浮》单元中,有四篇课文都涉及到测量物体“排开的水量”的实验。第三课《橡皮泥在水中的沉浮》中测量“排开的水量”的实验方法是:“取一个量杯,在量杯里倒入200毫升水,把橡皮泥做成实心团,放入量杯中,观察它排开的水量,再把橡皮泥做 First, the equivalent cylinder with - accurate measurement, easy to operate 1. Experimental equipment and experimental methods Existing problems In the fifth grade volume ”Shen and float“ unit, there are four texts are involved in the measurement of objects ”experiment of. The third lesson “plasticine ups and downs in the water,” the measurement of “open water” experimental method is: "Take a measuring cup, pour 200 ml of water in the measuring cup, the plasticine made solid group, put Into the measuring cup, observe the amount of water it is draining, and then make plasticine