roots

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Across
  1. 4. Greek for life
  2. 5. an instrument used to measure steps
  3. 7. to pull
  4. 9. a break of a structure or tissue
  5. 13. sound
  6. 16. to build
  7. 18. a break in a process, situation or system
  8. 19. an object thrown from a catapult
  9. 20. to build knowledge
Down
  1. 1. the smallest unit of sound
  2. 2. light
  3. 3. to throw
  4. 6. to measure
  5. 8. an instrument used to measure temperature
  6. 10. to burst or break
  7. 11. medicines that kill bacteria
  8. 12. a powerful vehicle used for pulling other equipment
  9. 14. to write
  10. 15. a soft, black form of carbon used in pencils for writing
  11. 17. Latin for life