Why is an inch worm called that name?

Answer 1

That they move slowly is the reason for calling an inchworm an inchworm.

Specifically, the caterpillars in question are the larval stages of moths in the Geomitridae family. They have three pairs of legs toward the front of the body, nothing in the middle, and two or three pairs of prolegs (abdominal appendages which facilitate movement) in the rear. They therefore move by pulling the rear end forward while holding on with the front legs and then progressing forward on the front legs while holding on with the prolegs.

The overall effect is one of inching along a surface.

Answer 2

You call an inch worm an inch worm because when it crawls it only extends an inch. The body length of an inch worm is an inch. That is why is it called an inch worm.

Answer 3

because it is only a inch long