The black patch is material that allows radar to penetrate with no interference. Under the dome is the look ahead weather radar. New planes have that cone painted, but the front still has material that allows the radar to see ahead.
An airplane doesnt HAVE to have a pointy nose. But aircraft designers are constantly looking for ways to reduce aerodynamic drag, and so aircraft are designed to be as streamlined as possible. Indeed many older aircraft dont have a pointy nose at all. Look up the Boeing stearman, the P-47 thunderbolt or the "super guppy" for examples.
each blue nose is roughly 4 inches tall and has 3 patches (even if they are big ones or small ones they still have 3)
The nose
In the cockpit of the aircraft. Typically near the nose of the craft.
Nacelle .
The relevant service manual for that aircraft.
An elevator is part of the control surfaces, usually at the rear of an aircraft, which changes the pitch or angle of attack of the aircraft. Basically it "makes" the aircraft nose up or nose down. See related link for an animated description.
Aircraft have to balance. They cannot be nose heavy or tail heavy.
A dogs nose is not supposed to change colour. If your dogs nose has changed colour from pink to patches of black, it may be because of a type of skin cancer called squamous cell carcinoma caused by sun exposure alot like melanoma in humans. If this is the case please see your veterinarian to get it treated.
The nose of the aircraft would start to point down
'Yaw' is a side to side movement of the nose of the aircraft.
The function of the nose is to give a certain amount of streamlining, so the aircraft has less wind resistance