Final answer:
A cyclic reaction is a chemical reaction that continues on and on, using the same materials in the same order, repeating itself and using some of the leftover products. Examples of cyclic reactions include the Krebs cycle in cellular respiration and the carbon cycle in nature.
Step-by-step explanation:
A chemical reaction that continues on and on, uses the same materials in the same order, repeats itself, and uses some of the leftover products is called a cyclic reaction. In a cyclic reaction, the starting materials are transformed into products, which then react to form the starting materials again. This process repeats in a loop.
An example of a cyclic reaction is the Krebs cycle or the Citric Acid Cycle in cellular respiration, where the same reactants are recycled to produce energy for the cell.
Other examples of cyclic reactions can be found in various chemical processes, such as the carbon cycle in nature or the recycling of materials in industrial processes.