Most model rockets have a nose cone that is either a solid block of balsa wood, or a hollow plastic shell. Some rockets require that a small amount of weight be added to the front end of the rocket to make it fly in a stable (straight) manner. In these rockets, nose weight is often added inside of hollow nose cones - common material for weight is a small blob of modelling clay or a solid blob of glue. When nose weight needs to be added to a rocket with a solid balsa nose cone, it is common to add a small metal washer to the bottom end of the nose cone (which will end up inside the body tube when the rocket is assembled.) The amount of nose weight needed in the size rockets commonly sold in hobby stores is usually between 0 and 20 grams.
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The purpose of the shock cord is to tie the nose cone to the body of the rocket, so it can come off, but not get lost. Using Google isn't very hard.
typically the nose cone is filled with a parachute to the rocket arrives on the ground safely.
It streamlines the nose, so the rocket flies faster.
"Rocket nose cone" pretty much says it all, I really don't think there is another suitable name.
You use fins and a nose cone on a bottle rocket because the cone reduces the drag on the rocket, and the fins help stabilize the rocket.
It streamlines the rocket and allows more speed.
It streamlines the nose.
nose cone
A perfect cone
nose cone
A streamlined plastic nose cone.