Metal pipes often burst when the water inside them turns to ice. This is because water expands when it freezes. It also becomes lighter. If ice did not float on water the seas would gradually turn to ice and no life would be able to survive on Earth.

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Metal pipes often burst when the water inside them turns to ice. This is because water expands when it freezes. It also becomes lighter. If ice did not float on water the seas would gradually turn to ice and no life would be able to survive on Earth.

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