How did the first peoples know which foods were safe to eat? Excellent question! Food historians make educated guesses based on ancient records and modern practices.
When water freezes its entropy decreases. This does not violate the second law of thermodynamics. The second law does not say that entropy can never decrease anywhere. It just says that the total entropy of the universe can never decrease.he entropy increases whenever heat flows from a hot object to a cold object. It increases when ice melts, water is heated, water boils, water evaporates. The entropy increases when a gas flows from a container under high pressure into a region of lower pressure.
As the temperature of ice decreases, it starts to contract. But it still has a greater volume than it does in the liquid state. So you have to be careful when answering the question. When water freezes it becomes a solid, but it is no longer water, it is ice (yes, of course it is just frozen water).his is a problem of states of matter. When water freezes, it changes state from a liquid to a solid. For example, steam will contract with pressure and cooling. The volume of water is not really affected by pressure, but it does contract with cooling. When water freezes, it actually expands.