Here's why:
* Scientific Standard: Celsius is the standard unit of temperature in the International System of Units (SI), the globally recognized system for scientific measurement.
* Convenience: The Celsius scale is designed with water as a reference point, making it convenient for understanding everyday temperatures.
* Global Use: Celsius is widely used in most countries around the world, especially in scientific and educational contexts.
While Fahrenheit (°F) is used in some parts of the world, it's less common in scientific settings. Kelvin (K) is an absolute temperature scale used in scientific research, but it's not typically used in basic science classrooms.