Joan uses a model to show how wood burns at the level of atoms and molecules. Her model tracks 840 carbon atoms that make up a small fraction of a wood sample. The table shows how the carbon atoms are converted into carbon dioxide as the wood burns over time. Which of the claims about the burning of wood is supported by Joan’s model? Select all the claims that are supported.
A. Matter is conserved during the burning of wood.
B. Chemical energy is conserved during the burning of wood.
C. Burning wood involves a series of chemical reactions that occur in one direction only.
D. Burning wood involves a series of chemical reactions that occur in both the forward and reverse directions.
E. Burning wood involves oxygen as well as carbon.