Match each SI base quantity to its unit.

### The pairs | Item | Matches | Why | |---|---|---| | Electric current | Ampere (A) | The ampere is the SI base unit used to measure electric current. | | Amount of substance | Mole (mol) | The mole is the SI base unit for amount of substance. | | Luminous intensity | Candela (cd) | The candela is the SI base unit for luminous intensity. | | Temperature | Kelvin (K) | The kelvin is the SI base unit for temperature. | ### The concept Each base quantity has a corresponding standard unit. Learning the pairs helps distinguish a base unit from derived units such as newtons or metres per second. ### Terms - **International System of Units (SI)**: the globally agreed scientific measurement system. - **Ampere (A)**: the SI base unit of electric current. - **Mole (mol)**: the SI base unit of amount of substance. - **Candela (cd)**: the SI base unit of luminous intensity. - **Kelvin (K)**: the SI base unit of temperature. ### Remember Memorize each base quantity together with its unit.