Parachutes are also used by the military. Soldiers jump with parachutes into battle. Equipment is dropped to soldiers by parachutes. The parachute is put into a pack when not being used. The rip cord opens the pack and the parachute comes out.
Air fills the parachute as it opens.
There is a small hole in the top of the parachute. Air goes through the hole. The parachute can then come down evenly. Make a small parachute with a weight at the end of the lines. Throw it up in the air and watch it come down slowly.