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Ice cubes stick together because when they come into contact with one another there is a thin film of water that exists between the points of contact. Because this water is between two ice cubes of freezing temperature, it cannot draw heat from the surrounding environment, and itself freezes as its temperature drops, fusing the two ice cubes together. The colder the ice cubes the more likely and fast this happens.

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11y ago
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13y ago

It is not always that case that the ice cubes will be joined.

For example, if the experiment is conducted in a sufficiently cold environment, then the cubes will not generally be joined after merely pressing them together with the hands.

It will be necessary to conduce an experiment to see at what temperature they will fail to join. Such an experiment could start at minus 5 degrees Celsius since it seems reasonable to suppose that is cold enough.

At sufficiently high temperatures (surely room temperature but possibly much lower), the cubes will join because they are already starting to melt at the surfaces exposed to the air.

By pressing them together, the touching surfaces are no longer exposed to relatively warm air and so they are effectively cooled by the surrounding ice. If the cooling is sufficient then the melted surfaces will re-freeze. Since the surfaces are in contact with each other, they will be joined.

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11y ago

Friction.

Lol, kidding.

Matterel force.

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12y ago

hydrogen bonding

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11y ago

Hydrogen Bond...

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Q: Why does two ice cubes on pressing stick together?
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Related questions

Why do ice cubes stick together at times?

A cold glass of water sometimes causes water vapour from the surrounding air to condense onto the surface of the glass. The same thing happens with ice cubes, but instead the water droplets condensing on the surface, they will instantly freeze and 'weld' ice cubes together. They also can stick together if put into a drink, where again, the water in the drink near the surface of the ice cube may get cold enough to freeze and cause the ice cubes to fuse together.


Why do ice cubes stick together in the freezer?

Answering the question and the question in the details below:Ice cubes stick together because the surface of ice is liquid-like and when the ice cubes touch, the surfaces freeze together. For more background, please view the answer to "Why is ice slippery?"The following answer gives some scientific details pertaining to ice:Water freezes at 0 degrees celsius, but the ice that comes out of your freezer is much colder.From the moment you put ice into water, the water gets colder and the ice gets warmer until there is one uniform temperature and all ice has turned to water. You can imagine how if the ice were cold enough, it could freeze all the water.Two cubes of ice at say -10C would easily freeze a thin layer of cold water surrounding them before they get down to the temperature at which they begin to melt.BUT I have noticed that often cubes that are half-melted will still stick together. How can this be? If it has been shrinking, the outer layer should be in the process of melting and therefore not cold enough to freeze its surroundings. I do not know the explanation for this. Perhaps I wasn't watching closely enough. Maybe they froze together when they were larger and for some reason the connections don't melt as fast as the other parts of the ice. More experimentation needed.


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