|After they got home, Mother helped Mary and Marcus get two glasses that fit inside each other.
They put very hot water into the bottom third of one glass. They filled the other with ice water.
Then Mother showed them how to place the glass with the ice water on top of the glass with the very hot water and make sure they fit together.
|After waiting a few minutes, the bottom glass had clouds form in the top of the glass, and rain began to fall.