Louis's Puzzle - Physics 10 Group 3 Discussion

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Across
  1. 3. small and massive, no charge
  2. 6. basic building block of everything
  3. 8. big and light, negative charge
  4. 9. like chalk, no regular crystal structure
  5. 11. attract protons and create nucleus
  6. 12. massive but small, positive charge
  7. 14. universe started from this huge thing
  8. 17. all your genetic make=up in one molecule
  9. 18. vary in brightness
  10. 20. 5% matter, 25% dark matter, 70% dark energy
  11. 21. this and chlorine makes up table salt
Down
  1. 1. invented by Dirac
  2. 2. light and produce electrical force
  3. 4. the only object in the Solar System with liquid surface water
  4. 5. mixture of rock and frozen gases
  5. 6. what is used in many experiments and even in medical imaging
  6. 7. my Professor calls himself this
  7. 10. held together by gluons
  8. 13. 240,000 miles from Earth
  9. 15. this is my name
  10. 16. these can wipe us out like they did the dinosaurs
  11. 18. the brightness of these has been used to get more accurate measurements of extreme distances and velocities
  12. 19. small rocky objects that orbit the Sun