![Floating icebergs off the Otago coastline, New Zealand.](http://static.sciencelearn.org.nz/images/images/000/001/309/full/Floating-icebergs20160630-8077-37uo9.jpg?1674165885)
Icebergs are thick masses of ice floating in the ocean. The reason why ice floats and is lighter than water is that a certain mass of ice occupies more space than the same mass of water. This is related to the characteristics of hydrogen bonds. This iceberg is floating off the Otago coastline.