STEAMMing Across History

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Across
  1. 2. Chinese invention commonly used on July 4
  2. 4. Astronomical telescope
  3. 6. Represents nothing
  4. 8. Faster than an airplane
  5. 9. Monumental structure; royal tomb
  6. 11. Cuneiform is the earliest form
  7. 14. Time; one revolution around the sun
  8. 15. Chinese invention for navigation
  9. 17. The 'M' in STEAMM
  10. 19. I, II, III, IV, etc.
  11. 22. Work can work better
  12. 23. French invention; "Off with their head!"
  13. 24. Beam of light
Down
  1. 1. The 'T' in STEAMM
  2. 3. Proposed the planets moved elliptically
  3. 5. Rebirth of Greek/Roman art
  4. 7. The 'E' in STEAMM
  5. 10. A system of numbers based on ten
  6. 12. The revolution of inventions
  7. 13. The 'A' in STEAMM
  8. 16. Inca record-keeping
  9. 18. The earth revolves around the sun
  10. 20. The 'S' in STEAMM
  11. 21. The library is full of them