Why does a bucket of water left outside in the cold will most likely break (it happened to me; filled a bucket for cleaning intentions, then something happened and I forgot it outside - then the winter came and when I came to retrieve it, the bottom was cracked), but the ice trays in the freezer?
I get that the water expanded in the bucket and somehow broke it (though i'd like to know exactly * why *; in that case, does the water freeze from top to bottom, or bottom to top? Why doesn't the ice expand upwards, why is the bottom broken? Could the sides break as well?) And so, why does the phenomenon not occur with ice trays?