Structures needs to be strong and stable to last a long time. A strong structure would not break or change its shape. In other words, the object can withstand any force. The shape of a structure is important. Shapes of strong structures make use of arches, rectangles, and triangles. Some structures last longer because of the material used to make the structure.
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Question 1 of 5
1. Question
Determine the strength and stability of these structures. Could it break or fall?
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Would it break or fall? Type: stable or not stable Type: strong or not strong 
This tent is . This tent is . 
These pyramids are .
These pyramids are .
This stool is . The legs on this stool is . 
This teepee is . The material used to frame the teepee is 
The rope is . The branch holding the swing is .
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Question 2 of 5
2. Question
Consider the shape of the structure below. What is the best reason that this structure is strong and stable?
Hint
Consider the shapes used for the structure to be stable.
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Question 3 of 5
3. Question
Select a material and its advantage.
Sort elements
- Metal
- Glass
- Plastic
- Wood
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Strong and tough; easy to shape and shiny.
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It is transparent and hard.
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It is light weight, a good insulator and waterproof.
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It is strong and durable; it can be shaped in almost any form.
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Question 4 of 5
4. Question
What type of material are they made of? Match the structure to the main material used to build it.
List: bamboo, bricks, buffalo skin, clay, mud, straw, wood
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Structure Main Material Used for the frame and for the walls. 
on the roof and for its walls. 
for the walls. 
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Question 5 of 5
5. Question
What type of material are they made of? Match the structure to the main material used to build it.
List: Â clay, metals, steel, straw, vine, wood
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Structure Main Material Used 
This bridge is made of and . 
This adobe house is made of mixed in with with some . 
This lock is made of . 
The railway tracks are made of . 
This abacus is made of .
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