Which of the following would scientists say is true about the universe? A. The universe started out very cold and is getting
hotter with time.

B. The universe started out very dense and has become less dense with time.

C. The universe is the same age as the Earth.

D. The universe and our galaxy are the same thing.

none of the above the correct answer is the earth is flat

B. The universe started out very dense and has become less dense with time

Explanation:

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

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.