During respiration, members if the animal kingdom use___and then release___ as a waste gas. A. Carbon dioxide; water vapor
B. Oxygen; carbon dioxide
C. Oxygen; hydrogen
D. Carbon dioxide; oxygen

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.