Most of the state is a low plateau with an average elevation of about 400 metres (1,200 ft), very low relief, and no surface runoff. This descends relatively sharply to the coastal plains, in some cases forming a sharp escarpment (as with the Darling Range/Darling Scarp near Perth).
Photosynthesis is a process used by plants and other organisms to convert light energy, normally from the Sun, into chemical energy that can be later released to fuel the organisms' activities.
Photosynthesis occurs in two stages, both of which require water. The first part of photosynthesis is ATP. Sunlight, absorbed by the chloroplasts in the plant's leaves, splits the water into hydrogen and oxygen atoms. The hydrogen atoms are used to make the chemical energy ATP, a type of fuel that enables the cells to produce food. Oxygen is then excreted from the plant.