Devices for Measuring Length

Fill in the blank:

The S.I. unit of length is ............ of time is ............ of mass is ............

Describe in steps how would you measure the length of a pencil using a metre rule. Draw a diagram if necessary.

State if the following statement is true or false: 

In ancient times, a cubit was used to measure the mass of an object.

Answer the following in short.

Which unit will you use to find the length of your notebook and why?

State if the following statement is true or false. Correct the statement if it is false.

A ruler with a damaged end can be used to measure a length accurately.