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  • Floating iceberg.
    Rights: National Institute of Water and Atmospheric Research (NIWA) Published 22 June 2014 Size: 49 KB Referencing Hub media

    Water is the only common substance that is naturally found as a solid (ice), liquid (water) or gas (water vapour in the atmosphere). It’s also unusual because its solid form (ice) is less dense than its liquid form. That’s why this iceberg is floating on the surface of the sea.

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