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实验准备:一个小盆、若干硬币、一瓶清水、一张纸巾、一块肥皂实验过程:1.将准备好的清水倒进小盆;2.拿一枚硬币,轻轻扔进盆里,你会发现,硬币迅速沉入盆底;3.再拿一枚硬币,用食指托住硬币,慢慢地把指头没入水中,使硬币平落于水面,观察硬币。(此过程操作要求较高,这里也可借用纸巾:把硬币放在单层纸巾上,捏着纸巾两边,轻轻放在水面,纸巾吸足了水,慢慢下沉,此时观察硬币的情况。)现象:你会发现,硬币漂浮在水面上。
Experimental preparation: a small bowl, a few coins, a bottle of water, a tissue, a piece of soap Experimental process: 1 will be prepared into the small basin of fresh water; 2 take a coin, gently thrown into the basin, you You will find that the coin quickly sinks into the pelvic floor. 3. Take another coin and hold it with your index finger. Slowly put your fingertips into the water and make the coin lie flat on the water and observe the coin. (This process requires a higher operation, you can also borrow paper towels: the coins on a single layer of paper towels, holding both sides of the paper towel, gently on the water, paper towels full of water, slowly sinking, then observe the coins Situation.) Phenomenon: You will find that coins float on the water.