Place an ink bottle filled to the brim with water in the freezing compartment of a refrigerator. Soon a column of ice will stick up out of the bottle.
Water behaves oddly: when warm water-cools it contracts, but if the temperature falls below 40C, it suddenly begins to expand again. At 0 C it begins to freeze, and in doing so increases its volume by one-eleventh. This is the reason why the ice sticks out of the bottle. If you had closed it, it would have cracked. Think about burst water pipes in winter and frost cracks on roads, in which water collected under the asphalt freezes.
Column of ice
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