What is the primary function of earth atmosphere a. to trap heat from the sun. b. to shield the planet from harmful radiation. c. to disintegrate space debris before to reaches the surface. d. all of the above.

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?