My Physics Puzzle

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Across
  1. 4. Year The distance light travels in a year
  2. 8. Any system that uses a low power input signal to control a higher output
  3. 9. Particles Currently the objects that we hope are the smallest components of matter
  4. 10. Cloud like patches seen in the night sky
  5. 11. A wire pushed through a magnet produces a voltage
  6. 13. A group of minimum number of atoms in the game ratio as in the bulk material
  7. 15. Usually tell about a potential force
  8. 17. Energy per electron
  9. 18. Helps adjust for differences in light intensity
  10. 20. These have very regular organized structure
Down
  1. 1. Bang Theory A ball of matter was so hot that it blew apart
  2. 2. Energy Stored up Energy capable of doing work
  3. 3. Consists of everything observable
  4. 5. Energy per electron
  5. 6. How much work done each second
  6. 7. An area of the sky named after a few stars located near one another as seen from earth; they may not really be near one another
  7. 12. Difficulty in passing current
  8. 14. Found in the nucleus of an atom
  9. 16. Energy Energy of speed
  10. 19. Distance over time