What is the System International of Units (SI)?
The SI is a system of units based on the metric system and used in most countries as the standard system for scientific measurements.
The SI defines seven fundamental units, including the meter, kilogram, second, ampere, kelvin, mole, and candela.
The SI also includes derived units, which are combinations of the fundamental units.
The SI is constantly updated and revised to reflect advances in measurement technology and scientific understanding.