Astolot Educational Centre – Alisa Miller – Grade 7 Science

Name: _________________________ Date: _________________________

Grade 7 Form and Function Unit Review Questions

Please complete the following in complete sentences. This will help

you study for the Unit Test on Tuesday, December 1st. 1. Fill in the blanks using the following words [truss, arch, stable, magnitude, rebar, centre of gravity, shape, form] a) An object is ___________________ if it maintains its shape and position over an extended period of time. b) The horizontal balance point of an object is very close to its ________________________________. c) A network of beams that form triangles is known as a ____________. d) The strength of a beam can be changed by changing its __________________. e) The shape and outer physical appearance of a structure is known as __________________. f) An _____________ supports a load by directing force downward along a curve. g) Reinforcing steel rods in concrete are called ___________________. h) The term ____________________ refers to the size of a force.

Astolot Educational Centre – Alisa Miller – Grade 7 Science

2. a) What is the difference between external forces and internal forces? (Sec 10.4) b) List the 4 internal forces forces, and give a brief description of each. 3. Decide which internal force each scenario is describing. (Sec 10.4) a) Sitting on a cushion b) Ripping a piece of paper in two c) Stretching an elastic band d) A sweater twisted in a clothes dryer 4. Explain four factors that can cause a structure to fail. (Sec 11.6)

Astolot Educational Centre – Alisa Miller – Grade 7 Science

5. Explain four ways that a beam can be strengthened. (Sec 11.2) 6. What is the main function of market research? (Sec 12.1) 7. Why is ergonomics important in the design of products? (Sec 12.4) 8. Classify each of the following structures as solid, frame, shell, or combination. Explain your choices. (Sec 10.3) a) a microwave b) a beaver dam c) a calculator d) a baseball bat

Astolot Educational Centre – Alisa Miller – Grade 7 Science

9. Identify the following structures as cantilever, truss, fully supported beam, or arch. (Sec 11.2, 11.4) a) b)

c) d)

10. Why is ergonomics important in the design of products? (Sec 12.4)