Perturbation
qualitative
Dont cheat. Read Chapter 4 of you Solar System text book and answer it yourself.
The Earth's annual motion around the sun is called a revolution.
the motion is called revolution
Apparent retrograde motion.
Disturbance in particle motion parallel to the wave velocity is called a longitudinal wave. Disturbance in particle motion perpendicular to the wave velocity is called a transverse wave.
Wave motion
Any kind of disturbance triggers mechanical waves that propagate perpendicular to the motion of disturbance. However for mechanical motion, it is necessary that the wave is propagated in a medium.
The disturbance traveled from one end to the other end in a medium without the acutal moment of particle is called wave motion.
motion
So they don't fall out of the sky.
Qualitative
qualitative
Aristotle's predictions of heavenly motion were qualitative rather than quantitative. He described the motion of celestial bodies in terms of their natural behavior and relationships rather than using mathematical equations or measurements.
qualitative
A wave is a disturbance that transfers energy from place to place.
The disturbance that travels sound waves is the wave itself. A wave, which is the motion of energy, is defined as a disturbance that travels through a medium whether it's air, liquid or a solid.