The temperature at which a liquid turns into a solid is called its freezing point.

However, it's important to note that:

* Every substance has a different freezing point. Water freezes at 0 degrees Celsius (32 degrees Fahrenheit), but mercury freezes at -38.83 degrees Celsius (-37.89 degrees Fahrenheit).

* Freezing points can be affected by pressure. For example, water can freeze at temperatures below 0 degrees Celsius if the pressure is increased.

So, there's no single answer to your question. The temperature at which a liquid turns to a solid depends on the specific substance.