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一、发现问题小明发现妈妈用热水泡的菊花茶中的块状冰糖溶解得很慢,便问妈妈怎样才能加快冰糖的溶解,妈妈说可以用筷子搅拌一下,小明边搅拌边观察,看到冰糖确实逐渐变小了。但小明想知道,除了搅拌外,还有什么方法能让冰糖在水中溶解得更快呢?固体物质在水中的溶解速率与哪些因素有关呢?二、做出猜想小明把自己的疑问告诉了同学们,同学们为此展开了激烈的讨论。最终,经过老师的指导,同学们提出以下几种猜想:
First, the discovery of the problem Xiaoming found that her mother with hot blisters in the chrysanthemum tea dissolves very slowly in bulk, they asked how to speed up the dissolution of crystal sugar, my mother said you can use chopsticks to stir, Xiao Ming observed while stirring to see Rock candy does get smaller. But Xiao Ming want to know, in addition to stirring, what other methods make crystal sugar dissolved in water faster? Solute solid in water dissolution rate and what factors? Second, make a guess Xiaoming his own question to tell the students We, students have launched a heated discussion. Finally, after the teacher’s guidance, the students made the following kinds of conjectures: