You breathe in more oxygen than you breathe out. And you breathe out more carbon dioxide than you breathe in. What type of change is oxygen turning into carbon dioxide?

Step-by-step explanation:

The food and drink (orginally carbon compunds) we take in are broken down into carbon compounds and most simplest being glucose (C6H12O6). When this glucose reacts with oxygen it forms carbon dioxide and water. So, this where CO2 comes from in the body. Energy is also released in the reaction which why we feel energetic after having food. This process is called cellular oxidation.