Process:  - Get an ice cube tray - Fill the tray with cool water - Place the tray in the freezer - Leave the tray in the freezer for a few hours - Take they tray out of the freezer - Pop the ice cubes out of tray.  Perturbation hypothesis: suppose there will be plenty of ice cubes happens, how will it affect there will be less ice cubes available.  Does the supposed perturbation have an effect (direct or indirect) on the process?
The answer to this question is:
yes