"Your sugar, Fred, cannot be seen in the water, although we know it is there. It is dissolved.""Thank you, father," said the children. "That makes it very plain.""Teacher gave us a new name for things that dissolve," said Fred. "All things that dissolve are said to be soluble.""Yes," said Willie, "and when we dissolve any of them, we make a solution.""Teacher showed us the meaning of these three hard words in another way," said Fred. "I think Iknow clearly now what a solution is. I will try and do it as he did it.
"Here is some chalk, crushed up into powder. I will put a spoonful of it into this glass of cold water. Now we will stir it up well. Can you see the chalk?""Yes," said Norah, "the water looks thick and white like milk.""The tiny little bits of solid chalk are floating about in the water," said Fred. "They will not dissolve. If we stir it all night, the chalk will not dissolve.
