Science 7 Assignment: Design and Function

Read all parts of your assignment carefully and record your answers in the appropriate places.

1. For each of the following structures, state whether it is a mass, frame, shell, or mix and match structure.
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2. For each structure in question 1.a., explain why you chose the type you listed.
   
   
   
   
   
   
   
   
   

Read question 2 carefully. Decide which of the choices BEST answers the question. Place your answer in the blank space given.

Which of the following is a natural structure?
1. grass hut
2. igloo
3. turtle shell
4. balloon

 

Use the photographs to answer the following questions.

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   Photodisc Collection/Getty Images
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1. How are the two structures similar?
2. How are the two structures different?

Compare the functions and materials of these three human-made structures.


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Functions:

Materials:

The human body is a mixed structure. What role do bones play in this structure? What role do ligaments play in the body’s joints?

This stepladder has several fixed joints and several hinged joints. Label two fixed joints and label two hinged joints.

A concrete-block retaining wall, used to hold back a mass of earth from a road, is a mass structure. Describe two ways the retaining wall can fail.

You are asked to design a structure to house a push mower, a small wheelbarrow, and assorted garden tools. What type of structure design will you choose? Support your decision with reasons for your choice.

Match each item in Column A with its appropriate example in Column B. Place your answer in the blank space given.

Column A	Column B
____ composite material	a. concrete driveway
____ layered material	b. gas pipeline
____ woven material	c. human knee
____ glued joint	d. parachute
____ welded joint	e. Tetrapakä
____ hinged joint	f. wooden pencil