Iceberg

From the Simple English Wikipedia, the free encyclopedia that anyone can change

An Iceberg is a large piece of ice floating around in the water. Icebergs usually break off from larger srtuctures made of ice, like glaciers or ice shelves. About 90% of the iceberg is below the water line. It is difficult ot determine how that part looks, from looking at the part of the iceberg that is visible.

An iceberg was the cause of the sinking of RMS Titanic in 1912.