Question

6. Are very large distances measured by normal measuring units? If not, then why and
what is the unit?
7. Why do we need a standard unit of measurement?

Answer 1

We need standard unit for measurement to make our judgement more reliable and accurate. For proper dealing, measurement should be same for everybody. Thus there should be uniformity in measurement. For the sake of uniformity we need a common set of units of measurement, which are called standard units.