The Big Bang

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Across
  1. 2. Electromagnetic radiation filling the universe that is a residual effect of the big bang.
  2. 3. Seconds to years.
  3. 4. Of the same or a similar kind or nature.
  4. 7. The required density for matter in order to make it so the universe will no longer expand nor shrink.
  5. 8. From hot to cold.
  6. 9. Quantity of mass per unit volume.
  7. 13. The four needed forces of the universe.
  8. 14. When the universe reverts to its original state.
Down
  1. 1. The science of the origin of the universe.
  2. 4. The telescope that is in space.
  3. 5. The universe expands so much that temperature drops.
  4. 6. A VERY fast speed.
  5. 10. From a big wavelength to a small wavelength.
  6. 11. A unit of measuring temperature.
  7. 12. The building blocks of everything.