The purpose of this experiment was to determine if temperature affects the mass of crystal growth. I became interested in this idea because I have my own crystal growing kit at home, and I would like to observe which temperature they grow largest in. The information gained from this experiment could aid scientists in growing larger crystals, as well as manufacturers who are interested in growing them. The computer industry has many uses for crystals, and this knowledge could help them. My hypothesis is that the crystals will grow best in warm temperature. I base my hypothesis on the fact that I have grown crystals before and the directions informed me to put them on a windowsill where they could be reached by sunlight.