This past summer, the water level of the lake was the lowest it's been since I've been there. We also had only three rainy days the whole summer. Since heat energy causes evaporation, I wanted to know if the great amount of sun had to do with the lack of water in the lake. My hypothesis was that the seventy-five watt bulb would cause the most evaporation. 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.