Big Bang Theory

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Across
  1. 1. A theory that states that the universe started as a hot, dense single point that expanded(and is still expanding), spreading out space, time and matter
  2. 4. The universe started as a hot, dense single point known as ___________
  3. 6. Device used to detect CMBR and help provide evidence for the Big Bang
  4. 9. Light and sound travel in ______
  5. 10. The perceived stretching or compressing of waves caused by the motion of the wave's source is known as the _______ effect
Down
  1. 2. The Big Bang is thought to mark the beginning of the universe starting 4.3 _______ years ago
  2. 3. CMBR stands for cosmic _________ background radiation
  3. 5. The shift of visible light towards the red end of the color spectrum caused by a light source moving AWAY from the observer
  4. 7. The Big Bang theory states that the universe is ______________ in all directions
  5. 8. Changes in the frequency of light waves is seen as _____