What is Metre Scale?

Fill in the blank spaces by choosing correct words from the list given below:

List: millimetre, kilometre, centimetre, metre.

The $1/10,000,000$ part of the distance from the equator to the north pole along the longitude passing through Paris is called a _____.

Number the things 1,2,3 from shortest to longest (or tallest).

Find out the length of the feather in the picture given below.

Name the standard unit for measuring length.