Origins of the Universe

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Across
  1. 1. Leftover energy from the Big bang.
  2. 4. All of space and everything in it, including stars, planets, and galaxies.
  3. 5. The theory that the universe began as a point and has been expanding ever since.
  4. 7. 74% of the universe is made up of ________.
  5. 8. An invisible form of matter that does not emit any detectable electromagnetic energy of its own
  6. 10. The shift to a different wavelength.
  7. 11. An invisible form of energy that creates a repulsive force causing the universe to expand.
Down
  1. 2. The shortening of a wavelength as an object moves toward the reference point.
  2. 3. dark matter can only be detected by its ______ effects.
  3. 6. The lengthening of a wavelength as an object moves away from the reference point.
  4. 9. The universe is ________.