Ripples in the Cosmic Microwave Background correspond to: A) ...

[wenmo]

Ripples in the Cosmic Microwave Background correspond to:
 
  A) matter density fluctuations.
  B) temperature fluctuations.
  C) energy fluctuations.
  D) fluctuations in both matter and radiation.
  E) imperfections in measurement techniques or equipment.

Question 2

Which of the following is most like the rotation of stars in the disk of the Milky Way?
 
  A) a DVD in a player
  B) the planets in our solar system
  C) cars moving at a constant speed on a circular race track
  D) the hands of an analog clock
  E) the tire of a car moving

[dyrone]

Answer to Question 1

D

Answer to Question 2

C