Surface to air is shot from the ground into the air at the target. Air to air is fired from another aircraft. Actually there is very little difference. just where the missile is fired from.
In Vietnam the US used Sparrows & Sidewinder air to air missiles. But ultimately the gun (20mm) proved to be a most commonly used weapon; by far by the NVAF MiG 17 & 19s.
A ballistic missile is a term that defines a missile's flight path. There are two types of flight paths as far as missiles are concerned: approach angle control and ballistic.
A ballistic flight...
SAMs (Surface to Air Missiles) which gained notoriety during the Vietnam War (shooting down B-52 bombers/and fighter bombers) are for air defense and are part of the air defense system; as were...
that's a very vague question. I'll try my best to answer it. First it depends where at you're talking about. At the Equator Air on land is colder than at sea. But as you go to either poles the water...