“爸爸,你在干什么呢?”儿子看到我蹲在水管旁问道。“哦,水管被冰坏了,我正在修呢!”我一边认真地拆装,一边对儿子说“。爸爸,水管为什么会冰坏呀‘?冰’怎么有那么大的力气呀……”我耐心地对儿子解释道“:因为水的密度比冰的密度大,当自来水管里的水变成冰以后,它的体积就会变大,然后就把水管给撑破了!就像你现在穿小时候的衣服,如果你用力撑衣服,衣服就会破掉。”“哦,密度是什么呀?”儿子睁大眼睛不解地问。“密度是个物理名词,是物质的一种属性。你现在理解这个有些困难,等你长大一些爸爸再给你 ”Dad, what are you doing?“ Son saw me squatting on the water pipe and asked. ”Oh, the pipes were iced up and I was repairing it! “ I said to my son seriously while disassembling and disassembling. ”Daddy, why water pipes get ice? ’ ... “” I patiently explain to my son. “Because the density of water is greater than the density of ice, when the water in the water pipe becomes ice, its volume becomes larger, and then the pipe is broken Like you now wear a child’s clothes, if you force the clothes, the clothes will be broken. ”“ Oh, what is the density? ”Son wide-eyed asked puzzled. Density is a physical term, a property of matter, and you now understand that it is a bit difficult to wait until you grow up and dad give it to you