In this brief frontline, we want to describe the well-known fact that, when freshwater ice melts,
the freshwater liquid level does not change. In the Italian Ministerial programs, fluid statics is
introduced in the three years of middle school (students of 11–13 years) and during the first two
years of high school (14–15 years). The Italian textbooks do not clearly explain why the
abovementioned phenomenon occurs. The explanations are qualitative and they may lead to
misinterpretation. I have noted that the students are very curious about this phenomenon. They
sought a demonstration from books and from the web; and when they do not find it they asked me.
Moreover, they have allowed me to observe that there are contradictory statements about the melting
of icebergs. Some authors claim that they would not raise the sea-level, others say the opposite.
Honestly speaking, I had never thought about this phenomenon and in classroom I tried to give them
proof, expressing my opinion abou…