there are two primary modles of the universe. one is the expanding model, which says that the universe is approximately constant in size and shape. what evidence would you expect to see if the expanding model were correct?​

-hails tea

explanation:

-t poses

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.