16. Deform -  What it means to change shape

17. Compression - the force that squeezes material together.

18. Tension - the stretching force that pulls on material.

19. Bending – A structural element subjected to an external load applied perpendicularly to a longitudinal axis of the element.

20. Torsion – The action that twists a material.

21. Shear – The force that causes parts of material to slide past each other in opposite directions.

22. Truss - a rigid frame made up of short straight pieces that form triangles.

23. Beam - A rigid, horizontal element in a structure

24. Joint - What connects two or more adjacent parts of a structure.

25. Column -  A strong, vertical element in a structure

26. Pressure -  The force applied or distributed over an area

27. Rigid -  The ability to resist deformation when subjected to a load

28. Brittle -  A weak material that fails without warning