Question

(a) What is standard units of measurement?
(b) In earlier days, the length was measured by means of the span of hand. Why it is not considered as standard unit of measurement?
[5 Marks]

Answer 1

(a) A standard unit of measurement is a quantifiable language that describes the magnitude of the quantity. It helps to understand the association of the object with the measurement. The SI unit of length, metre(m), is a standard unit. [2 Marks]

(b) Hand span is not considered as a standard units of length because their sizes vary from person to person. So, two different persons may give different measurements for the same length, which is not desirable for a standard unit. [3 Marks]