# Unit 4:Topic 1: Types of Structures

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Question 1
Before the class went on the field trip they learned about classifying different types of structures. Which of the following is not a characteristic by which structures may be classified?
 a. purpose b. location c. design d. origin
Question 2
One of the first buildings that the class examined was their school. How did the students classify their school?
 a. a mass structure b. a shell structure c. a frame structure d. all three types of structures
Question 3
The class climbed aboard a school bus to go to their next stop. Jacob realized that the bus itself could be classified as a frame structure because frame structures:
 a. have a thin, carefully shaped outer layer to provide strength and rigidity b. are never designed to be flexible, but rather they are always very rigid structures c. provide a strong structure with empty space inside d. are the only type of structure found in automobiles
Question 4
During their bus ride to their next stop, Jacob noticed three hot air balloons soaring high in the air. Jacob knew that the balloons themselves were examples of this type of structure:
 a. a mass structure b. a shell structure c. a frame structure d. all three types of structures
Question 5
The next stop on their field trip was at a large dam made of rocks and dirt. The engineers working on this earthen dam designed it as a mass structure. Which of the following statements explain why?
I. Parts of the mass structure can be worn away without it failing.
II. A mass structure relies on the weight of the material itself to stay firmly in place.
III. A mass structure will never fail.
IV. The framework inside a mass structure prevents the structure from collapsing.
 a. I and II b. I and IV c. I, II, and IV d. I, II, and III
Question 6
The students sat by the edge of the reservoir to eat their lunches. During their lunch, Marcy, one of Jacob???s classmates, noticed many interesting structures around her. She saw a spider web, an anthill, and a poplar tree. What do all of these structures have in common?
 a. They are all manufactured structures. b. They are all examples of mass structures. c. They all have the same basic design, though each has its own purpose. d. They are all natural structures.
Question 7
The anthill that Marcy saw is an example of which type of structure?
 a. a mass structure b. a shell structure c. a frame structure d. all three types of structures
Question 8
When the class had finished their lunches, they took a walk downstream along the riverbank. They noticed that city workers had piled up sandbags to prevent the water from eroding away the bank of the river and washing the footpath into the river. Which of the following is not a reason why the sandbag wall structure may fail?
 a. The wall of sandbags may not be heavy enough to keep itself in place and may be washed away by the water. b. Because it is a frame structure, the empty space inside the sandbag wall may allow water to get inside the structure and cause the structure to fail. c. Some of the sandbags may not be properly placed and so they may be washed away, causing a weak spot in the structure that may cause it to fail. d. The structure may not be firmly anchored to the ground, causing the whole structure to be washed away.
Question 9
The class next visited a construction site where some new homes were being built. Jacob learned that nailing plywood sheathing to the frame of a house dramatically increases the strength of the house. Which of the following provides the best explanation for the increase in strength?