The SI unit is the International System of Units, which provides a standardized system for measuring physical quantities. In the context of meters, it refers to the fundamental unit used to measure length.
Think of the SI unit as a universal language for measurements. Just like how people from different countries can communicate using a common language like English, scientists and engineers use the SI unit to communicate and understand measurements across different fields.
Kilometer: A metric unit equal to 1000 meters.
Centimeter: A metric unit equal to 1/100th of a meter.
Millimeter: A metric unit equal to 1/1000th of a meter.
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