An object's average speed is
(the distance it traveled during some time)/(the time it took to cover the distance).
Its average speed.
I'm uncertain about what you are seeking here. The change in an objects speed divided by the time required to change the speed would be the average acceleration.
The measure of an object's particles average kinetic energy is its temperature. Temperature relates to the average speed of particles in an object.
Assuming that by "objects" you mean object's, by "traveled" you mean travelled, and by "dived" you mean divided, the answer is average speed.
when you know both speed and direction of an objects motion you know the velocity of an object.
This describes the average speed. If there is a direction specified that the distance has moved, then it will be a vector, and called average velocity.
The time and distance between two reference points, then compute the average speed.
The speed varies according to the refractive index of the objects.
Speed only tells how fast something is going, while velocity tells speed and direction.
Green
Average speed is an average value of speed over a given time. If your speed is constant (not changing), then your average speed will equal your speed at any given moment in time.
Different objects can have different speeds; also, the same object can have one speed now, and a different speed later.