MEASUREMENT:
Measuring a physical quantity means “comparing it with some standard quantity (unit) to know its magnitude”. e.g A shopkeeper measures the cloth in meters and sugar in kilograms. In school a period is measured in minutes or seconds.
UNIT:
The standard quantity with which things are compared is called a unit. e.g 5 meter cloth. 3 kg sugar, 40 minutes period. In the above examples meter, kg and minutes are units.
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