science and technology-structures

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Across
  1. 5. moving up and down like scissors
  2. 6. force from inside
  3. 10. circular motion like bottle cap
  4. 11. pulling outwards
  5. 12. how the structure looks
  6. 15. taking down scaffold
  7. 17. something that is fast and easy to make to work on structures
  8. 18. the safety of a structure
Down
  1. 1. making scaffold
  2. 2. some parts are broken
  3. 3. bending but nothing is broken
  4. 4. it has broken
  5. 7. force from outside
  6. 8. pushing inwards
  7. 9. it supports a certain load
  8. 13. a type of structure that isn't hollow
  9. 14. getting bigger in all directions
  10. 16. a type of structure that is the outlining
  11. 19. a type of structure that is hollow