Base Unit

Key Stage 5

Meaning

Base units are the fundamental units that define the SI system.

About Base Units

• The scientific base units are
  • Length = metre (m)
  • Mass = kilogram (kg)
  • Time = second (s)
  • Current = ampere (A)
  • Temperature = kelvin (K)
  • Amount of a substance = mole (mol)
  • Luminosity = candela (cd)
• They form the basis for derived units.
• Ensure consistency in measurements across different fields of science.

Examples

• The metre is used to measure length.
• The second is the unit of time in the SI system.