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Across
  1. 6. - What it's made of.
  2. 7. - Pure substance.
  3. 9. - About science.
  4. 11. - Anything with weight and space.
  5. 12. - Basic rules.
  6. 13. - Positive particles.
  7. 14. - Qualities.
  8. 16. - Look carefully.
  9. 17. - Group of atoms.
  10. 19. - Abor nachines.
Down
  1. 1. - Repeated design.
  2. 2. - Study of matter.
  3. 3. - Test or trial.
  4. 4. - Smallest particle.
  5. 5. - Across subjects.
  6. 8. - Neutral particles.
  7. 10. - Properly.
  8. 13. - Force on area.
  9. 15. - Blend of things.
  10. 18. - Surroundings.