Process:  - Water evaporates from the ground up to the sky - Water droplets are in clouds - The air gets cold - Water droplets turn into ice crystals - Ice crystals in clouds stick together and become snowflakes.  Perturbation hypothesis: suppose more ice crystals become snowflakes happens, how will it affect LESS snow.  Does the supposed perturbation have an effect (direct or indirect) on the process?
Answer:
yes