The Big Bang

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