The calomel half cell is a half cells formed by a metal in contact with an insoluble salt or oxide and a solution. It is commonly used as a reference Half Cell . For example, sucrose has the formula C12H22O11. Thus, the words triose, tetrose, pentose, hexose, etc., denote the number of carbon atoms forming a straight chain in the carbohydrate. The simplest carbohydrates are the sugars including glucose and sucrose.
Polysaccharides are carbohydrates of much greater molecular weight and complexity.
The carbon cycle is the natural process where carbon is circulated through animals, plants, soil and the air in the environment. The carbon cycle is one of several major cycles of chemical elements in the environment. Plants absorb Carbon Dioxide from the atmosphere and produce oxygen and sugars in the photosynthesis process. Conversely, animals breath in oxygen and breath out carbon dioxide. Living organisms obtain energy from their food by means of a slow form of combustion called respiration.