AP BIOLOGY

Detailed explanation-1: -At temperatures below 32°F (0°C), liquid water freezes; 32°F (0°C) is the freezing point of water. At temperatures above 32°F (0°C), pure water ice melts and changes state from a solid to a liquid (water); 32°F (0°C) is the melting point.

Detailed explanation-2: -Water freezes at 0 degrees Celsius (or 32 degrees Fahrenheit) because that is the temperature at which the molecules of water slow down enough to form a solid structure, instead of moving randomly as they do in a liquid state.

Detailed explanation-3: -As soon as ice gets to zero it begins to melt. But freezing is a bit different. In fact, pure water can easily be cooled quite a long way below zero Celsius and stay as liquid water. We call this supercooled water.

Detailed explanation-4: -The melting point of ice at 1 atmosphere of pressure is very close to 0 °C (32 °F, 273.15 K), this is also known as the ice point.

Detailed explanation-5: -Water Freezes at 0 Degrees Celsius If you doubt a scientific fact, the scientific method is here to prove it for you. Enough scientists have tested the temperature at which water freezes, and have determined that the answer is 0 degrees Celsius (or 32 degrees Fahrenheit).