Which of the following is not one of the three principles from which the metric system is based?

The metric system has one basic unit for each measurable quantity, uses prefixes such as kilo- and milli- to show multiples or fractions, and relates its basic units through powers of ten. Metric measurements can be converted to other measurement systems, so the claim that they cannot be converted is not a principle. The correct choice is “Metric measurements cannot be converted to any other form of measurement.”

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