Question

according to big bang theory, the universe started out with a very hot beginning and has been cooling and expanding ever since. which two observations of cosmic microwave background radiation support big bang theory? a. cosmic microwave background radiation exhibited and reversed in mass over time. b. cosmic microwave background radiation exists in all areas of the observable universe. c. cosmic microwave background radiation contains all of the dark matter necessary to start the big bang. d. cosmic microwave background radiation stores the same amount of energy the big bang likely released. e. cosmic microwave background radiation has a relatively consistent temperature throughout the observable universe.

Explanation:

The cosmic microwave - background radiation (CMB) is evidence for the Big Bang theory. It exists uniformly throughout the observable universe and has a relatively consistent temperature. These observations support the idea that the universe had a hot, dense beginning and has been expanding and cooling. Option A is incorrect as CMB is not known to exhibit and revise in mass over time. Option C is wrong because CMB does not contain all the dark matter necessary to start the Big Bang. Option D is incorrect as there is no evidence that CMB stores the same amount of energy as the Big Bang likely released.

Answer:

B. Cosmic microwave background radiation exists in all areas of the observable universe; E. Cosmic microwave background radiation has a relatively consistent temperature throughout the observable universe.