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    Rights: New Zealand Defence Force, Crown Copyright Published 21 June 2007 Size: 590 KB Referencing Hub media

    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.