# Scientific Measurements 1. A *value* (size/magnitude) 2. A *unit* (standard comparison of measurements) 3. An indication of *uncertainty* (margin of error) --- ###### International System of Units (SI Units) > [!info]+ Base Units of the SI System > a > > | Property Measured | Name of Unit | Symbol of Unit | > | ------------------- | ------------ | -------------- | > | Length | Meter | m | > | Mass | Kilogram | kg | > | Time | Second | s | > | Temperature | Kelvin | K | > | Electric Current | Ampere | A | > | Amount of Substance | Mole | mol | > | Luminous Intensity | Candela | cd | ## SI Base Units --- ## SI Derived Units ---