Write a balanced chemical equation for the reaction of iron with oxygen to form iron oxide (Fe2O3).
Then write a description of what you would observe as a piece of iron rusts. Which one is mostly a
chemical description, and which one is mostly a physical description? (4 points)

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.