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define a structure
- holds a load
- All structures have a definite size and shape
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define strength
describes how well a structure and/or material can resist forces (like push, pull, twist, etc)
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define stability
- if an object is stable it will stand firm and will not fall over
- many factors affect stability, like how tall or wide an object is, how heavy and object is, and the area of the base
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name 3 natural structures
- rocks
- caves
- beaver dams
- bird nests
- trees
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name some man made structures
- house
- car
- chair lift tower
- office building
- barn
- table
- toy box
- desk
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what was learned in the cardboard tube experiment
- shorter objects are more stable than taller objects
- the taller the object the less stable it is
- I know this because the taller tube fell first
- I also learned that you can make tall objects more stable by adding weight to the bottom and making the base wider
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Is a short structure more stable or less stable
more stable
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is a tall structure more stable or less stable
less stable, it will fall easier
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what did you learn about stability
- a heavier load should be put on the bottom
- put weight in the base
- the base should be wider than the top
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