What is ice?

There are three fundamental states of matter on Earth: solid, liquid, gas. Although there’s many more states a matter can take, most of them require very specific conditions (like extreme temperature or very high density) to occur and are hard to observe in everyday life.
When we talk about water, the first thing that comes to our mind is it’s liquid state. This is the most common state we can see water in, but what about two other states? Gas form of water is called steam or water vapor and the solid state – ice.

What is freezing point?

Definition of freezing point is as follows: the temperature at which a liquid turns into a solid. It’s a point after crossing which the given substance changes it state to solid one. For water it means turning from liquid to ice.

So what temperature does water freeze? Water keeps its liquid state in temperature range between 0°C to 100 °C (32°F to 212 °F). It turns to steam when it’s temperature is above 100 °C (212 °F). As fot solid state, the freezing point of water in Celsius is 0°C, while freezing point of water in Fahrenheit – 32°F. Of course each substance has its individual freezing point, so we must remember that term “freezing point” doesn’t stand for any specific temperature, but rather a threshold of a certain process.

What happens to water when it freezes?

So how does the freezing process looks like and how is ice formed? When in liquid form, molecules of water are in constant motion. However, lowering temperature below freezing point causes them to slow down and then settle into place, creating regular formations. As for how long does it take for water to freeze, it depends on various factors: amount of water, its starting temperature, type of container it’s in, barometric pressure, air temperature and cooling method. However, if you want a specific example, for a plastic bottle of clear water placed in the standard freezer, it could take anything between a half to 2 hours.