What’s the lowest unit of measurement

Question: What's the lowest unit of measurement
- Keywords:
  measure,
  measurement,
  unit
Asked by erkin to Amy, Sarah, Will on 21 Jun 2012.
- Sarah Martin answered on 21 Jun 2012:
  
  Hi erkin,
  
  that really depends on what you’re measuring! Weight? Electricity? Size? Distance? Force?
  
  In quantum physics the smallest unit is the Planck Scale – Physicists use this scale to measure the smallest sizes or the shortest lengths of time that can exist.
  
  🙂 Sarah

Question: What's the lowest unit of measurement