1. Length: Meter (m)
2. Mass: Kilogram (kg)
3. Time: Second (s)
4. Electric current: Ampere (A)
5. Thermodynamic temperature: Kelvin (K)
6. Amount of substance: Mole (mol)
7. Luminous intensity: Candela (cd)
These base units are independent of each other, and all other physical quantities can be derived from them. For example, velocity can be derived from length and time (m/s), and density can be derived from mass and volume (which is derived from length).
It's important to note that some quantities are considered derived quantities, meaning they are defined in terms of the base units. Examples of derived quantities include:
* Area: square meters (m²)
* Volume: cubic meters (m³)
* Velocity: meters per second (m/s)
* Force: Newtons (N) - which is kg⋅m/s²
So, while there are many different units used in various fields of science and engineering, the fundamental quantities are the seven base units defined by the SI system.
