The process by which producers make food by the help of carbon dioxide and water in the presence of light is known as photosynthesis.
The ultimate source of light on earth is sun. Plant absorbs light from sun which is converted into chemical energy. The glucose produced is used by the plants for metabolic processes.
Water has a fairly high specific heat, which means that enough heat must be added to it to break the hydrogen bonds between the molecules, allowing them to move freely from each other and escape the water's surface.
