Give two examples each of modes of transport used on land, water and air.

Fill in the blanks:

i. One meter is ____ cm.

ii. Five kilometers is ____ m.

iii. Motion of a child on a swing is ___.

iv. Motion of the needle of a sewing machine is __.

v. Motion of wheel of a bicycle is ___.

Why can a pace or a footstep not be used as a standard unit of length?

Arrange the following lengths in their increasing magnitude:

1 meter, 1 centimeter, 1 kilometer, 1 millimeter.

The height of a person is 1.65 m. Express it into cm and mm.