Nine inches is the average length for an adult, but for a young threadworm is about 3 or 4 inches. Hope I could help! If this didn't help, you can go to wikipedia.com and in the search bar: type in "threadworms" and it will give you all type of information on them.
A silk worm.
it is a manicougan
Make the worm look natural. Don't "thread" it!
Yes, a parallel sided screw thread is in effect a worm gear.
thread worms.
The bootlace worm (Lineus longissimus) is considered the longest creature in the world, with some individuals reaching lengths of up to 55 meters (180 feet). This thin, thread-like marine worm lives in the deep waters of the North Atlantic Ocean.
it is about 300-900meters {1000-3000 feet}long
The thread snake is only four inches long and can easily be mistaken for a worm due to its slender body and small size. Additionally, this snake has a worm-like movement which adds to the confusion.
in case of simple screw jack it's single start square thread in case of worm geared screw jack it's double start square thread double start gives greater speed but requires more torque ,hence worm geared :)
10,000000 meters in the grownd
A particular length of thread or yarn conforming to the kind of fiber is called a hank. For linen, it is 274 meters (300 yards). For cotton, a hank is 768 meters (840 yards).
An earth worm is plump and long. A round worm is long and slender almost like a hair.