Mnemonic Device
- 30 is HOT, 20 is NICE, 10 is COOL, 0 is ICE.
Explanation
This is a mnemonic to help you get a feel for temperatures in degrees Celsius. 30°C is a HOT day, 20°C is a NICE day, 10°C is a COOL day, and 0°C is the temperature water freezes into ICE.