Whats the difference between rotation and revolution?

This is a matter of definitions, so no explanation.

Rotation is spinning on an axis (think of the Earth rotating to make the days go by, or a ballerina spinning on their toe). Revolution is when something revolves around something. It moves around that object in a ring, so how the Earth revolves around the sun, or cars on a race track revolve around the center of that track.

experiments.

surveys.

questionnaires.

interviews.

case studies.

participant and non-participant observation.

observational trials.

studies using the delphi method.

answer; existed; limited;