Question

define rotason and revulation​

Answer 1

Answer:

Rotation- When the earth moves (rotates) on it's own axis is called rotation

Revolution- When the earth moves (revolves) around the sun on its orbit is called revolution.

Answer 2

Rotation is the movement of earth on its axis.

Revolution is the movement of earth on the elliptical orbit around sun.

PS - THESE ARE THE SIMPLE DEFINITIONS.