Seven Base Units Quiz

Base Units in Measurement

• Base units are fundamental quantities in the International System of Units (SI).
• Not all physical quantities qualify as base units; for example, luminous intensity might be considered non-essential.

Standard Definitions

• The definitions of base units are standardized and provided in a dedicated section of the SI documentation.
• This section is crucial for ensuring consistency in measurements across various scientific fields.

Quantity of Base Units

• There are a total of seven listed base units for physical quantities in the SI system.

Seven Base Units

• The seven base units comprise:
  • Meter (m) for length
  • Kilogram (kg) for mass
  • Second (s) for time
  • Ampere (A) for electric current
  • Kelvin (K) for temperature
  • Mole (mol) for amount of substance
  • Candela (cd) for luminous intensity

Location of Definitions

• The standard definitions of these base units can be found in the introductory sections of measurement standards.

Table 1.1 Overview

• Table 1.1 features the names and symbols of the seven base units:
  • Length: meter (m)
  • Mass: kilogram (kg)
  • Time: second (s)
  • Electric current: ampere (A)
  • Temperature: kelvin (K)
  • Amount of substance: mole (mol)
  • Luminous intensity: candela (cd)