<p style="max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 1px; text-align: justify; white-space: normal; background-color: rgb(243, 226, 211); color: rgb(105, 62, 51); font-size: 15px; overflow-wrap: break-word !important;"> 小朋友们在生活中一定观察到过,一般来说,纸片不小心落在水里(提醒大家,不能乱扔垃圾哦),即使整张纸都湿了,也不会轻易沉下去。可如果我们往水里加上一点其他的物质呢?纸片是会继续漂在水面上?还是会渐渐“石沉大海”?</h3><p style="max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 1px; text-align: justify; white-space: normal; background-color: rgb(243, 226, 211); font-size: 15px; overflow-wrap: break-word !important;"><font color="#010101"> 科学源于对生活的观察和思考,今天的实验因为“水”的不同,会有意想不到的结果哦~</font></h3><p style="max-width: 100%; clear: both; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 1px; text-align: justify; white-space: normal; background-color: rgb(243, 226, 211); font-size: 15px; overflow-wrap: break-word !important;"><font color="#010101"><strong style="max-width: 100%; overflow-wrap: break-word !important;">实验材料</strong>:色素(彩笔色即可)、2个玻璃杯、卡片、冷水、热水。</font></h3> <h3><font color="#010101"><p style="font-size: 15px; max-width: 100%; clear: both; min-height: 1em; color: rgb(105, 62, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 1px; text-align: justify; white-space: normal; background-color: rgb(243, 226, 211); overflow-wrap: break-word !important;"><strong style="max-width: 100%; overflow-wrap: break-word !important;">实验原理:</strong></h3><p style="font-size: 15px; max-width: 100%; clear: both; min-height: 1em; color: rgb(105, 62, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 1px; text-align: justify; white-space: normal; background-color: rgb(243, 226, 211); overflow-wrap: break-word !important;"> 小朋友们,你们知道为什么冷热水不混合吗?</h3><p style="font-size: 15px; max-width: 100%; clear: both; min-height: 1em; color: rgb(105, 62, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; letter-spacing: 1px; text-align: justify; white-space: normal; background-color: rgb(243, 226, 211); overflow-wrap: break-word !important;"> 原来,水是由无数的水分子组成,这些小小的水分子是在不停运动的,热水的分子运动要比冷水更加剧烈,所以相对密度就会低于冷水,因为密度不一样的原因,热水就会浮在冷水上面,形成冷热水不混合的效果。今天的实验小课堂,又学到了新的知识,一起和爸爸妈妈实验一下吧。</h3></font></h3>