Final answer:
Cells produce energy through a process called cellular respiration, which involves the oxidation of carbohydrates and oxygen. The waste products of this process are carbon dioxide and water.
Step-by-step explanation:
Cells produce energy through a process called cellular respiration, which involves the oxidation, or burning, of organic material. The main chemicals involved in this process are carbohydrates and oxygen. Carbohydrates, such as glucose, are broken down through a series of chemical reactions that release energy. Oxygen is used as an electron acceptor in these reactions. The waste products of cellular respiration are carbon dioxide and water.