The reason for my hypothesis is this. All substances have molecules. These molecules have a certain amount of kinetic energy. The more kinetic energy molecules have, the faster they move allowing them to break free of the bonds that hold them together. Evaporation takes place when molecules of a substance have enough kinetic energy to escape from the substances surface.
Kinetic energy comes from heat.
Therefore, the more heat a substance obtains, the more kinetic energy it has which causes evaporation. Another way of saying it is, the higher the temperature, the more rapid the evaporation. I then put the boxes together. I measured to the center of the top of the box and placed a dot there. I then poked the light socket through at the dot, making sure that the prong was exactly two and one-half inches above the box.