你相信吗?在瓶子的世界,就算“身材”“体重”一模一样,但运动起来的速度也可能大不相同!瞧,水瓶子和米瓶子正要举行一场精彩的翻滚比赛。猜猜看,它们谁翻滚得更快呢?实验准备:两个一样的塑料瓶、清水、大米、一个天平、一块木板、几本厚书。实验步骤这下,我们都一样重了。1将清水、大米分别倒入两个瓶子中。 Do you believe it? In the world of bottles, even with the same “body” and “weight”, the speed of movement can be quite different! Look, the bottle of water and the bottle of rice are going to hold a wonderful roll race. Guess who they roll faster? Experimental Preparation: Two identical plastic bottles, water, rice, a balance, a piece of wood, a few thick books. Here are the experimental steps, we are all the same weight. 1 will water, rice, respectively, into two bottles.