lesson 1 physical world

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Across
  1. 4. world
  2. 5. perception
  3. 6. matter
  4. 9. matter
  5. 11. measurement units
  6. 12. branch of science
  7. 14. mind
  8. 15. mathematical method
  9. 16. nature
Down
  1. 1. interaction
  2. 2. free will
  3. 3. observer
  4. 7. field
  5. 8. physics
  6. 10. model
  7. 12. exact science
  8. 13. volume