Technology Grade 8

Term 1

1
Frame Structures
50 minutes

Key concepts for structures:

  • Frame structures are made up of severa members.
  • Each member of a roof truss performs a particular function in a truss.
  • The four different forces that may act on structures are tension, compression, shearand torsion forces.
  • Each different force has a different effect on the members of trusses.
  • There is a simple method to identify tension and compression forces in members of trusses.
  • Trusses need structures that form triangles in order to be rigid.
  • Electrical pylons need to include triangular forms (triangulation), so that they can be rigid.
  • Cross-bracing in electrical pylons makes them resistant to torsion forces.
  • Several very different structures are used to span spaces.
  • Structures can fail from a lack of strength (they can fracture), a lack of stiffness or rigidity (they can bend) or a lack of stability (they can fall over).

Term 2

1
Reducing the negative impact of technology
50 minutes

Write a report on reducing the negative impact of plastic bags on society and the environment.

Only click finish once you have completed the report in your notebook.

2
Investigate what paper and cardboard is made of
50 minutes
3
Draw the development of a box
50 minutes

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Enrolled: 33 students
Duration: 2020 Academic Year
Lectures: 4
Level: Intermediate

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