How it works the muscles in pairs

Let's go through this experience we understand how it works the muscles in pairs

Materials needed:

Promises sundae

Two tapes Mtattiyan

Cutter

Stud Paper

Adhesive tape

Action steps :

1 . Latest Slicer by a hole in one end of each stick. Should not be too close to the hole party 2 . Put one above the other and chopsticks Thbthma together by Stud paper. Open ( ( legs ) ) cleat towards the outside in order to prove Alaudan together. 3 . Cut two strips Almtatian so that each long strip of rubber. 4 . Bit by party bar rubber adhesive tape at the inner edge of a chopsticks. 5 . Proved the second party of the bar in the middle of the inner edge of the other promises. 6 . Repeat steps 4 and 5 for the second rubber band, but on the edges of the two external Udi candy. 7 . Move the chopsticks in and out gently and watch what happens to the rubber bar.

What happened?