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Are there any other chemicals in the ocean to keep the water from freezing?
- Jaymi Solomon (age 12)
Salt is by far the most important chemical in the oceans making it hard for them to freeze. Salt makes the freezing temperature lower than it would be for pure water. Salt isn't special that way, but there is a lot more of it dissolved in the oceans than there is of other chemicals. You can search this site for many answers on 'saltwater freezing'.
Some fish, however, have special antifreeze chemicals in their blood to keep them from freezing. These chemicals glom onto the little beginnings of ice crystals before they become big enough to start growing. The fish can make it through a winter that's cold enough to keep them frozen, if these ice crystals ever had a chance to grow.
(published on 11/14/06)
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