What are Fahrenheit and Celsius degrees and how do they relate to temperature?

Fahrenheit and Celsius degrees are units of temperature scales, which basically measure how "hot" something is. Both measure in increments called degrees, but the degrees are not the same size on both scales. Water freezes at 32 degrees Fahrenheit (32 °F) or at 0 degrees Celsius (0 °C). Water boils at 212 degrees Fahrenheit (212 °F) or 100 degrees Celsius (100 °C). The range between where water freezes and where water boils, is therefore 180 degrees Fahrenheit or 100 degrees Celsius. So 180 Fahrenheit degrees cover the same interval as 100 Celsius degrees. And there are 1.8 Fahrenheit degrees for every 1 Celsius degree. When a temperature changes by 1°C, it changes by 1.8°F. Converting from Each Scale (see the related question) (see the related links for online conversion)