The **International System of Units** (SI) is system of units of measurements based around the number 10.

Example #1: The SI contains nine **BASE UNITS** that each represent a different kind of physical quantity. These are commonly used as a convention.

The** International System of Units (SI)** provides 9 units of measurement as the foundation from which all other SI units can be derived.

**Derived Units** are generated through mathematical relationships between the **base units**. They represent a combination of the base quantities.