Final answer:
Water boils at 100 degrees Celsius, which is the boiling point on the Celsius temperature scale.
Step-by-step explanation:
Water boils at 100 degrees on the Celsius temperature scale. To provide further context, the Celsius scale designates the freezing point of water at 0°C and the boiling point at 100°C, with each degree on the Celsius scale being 1.8 times larger than each degree on the Fahrenheit scale. In contrast, on the Fahrenheit scale used primarily in the United States, the boiling point of water is at 212°F.