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5th Grade Science Engineering Quiz

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Question
Answer
4 things engineers/architects need to find out about the area they plan to build a bridge.   1 - Span 2 - Traffic Load 3 - Soil and bedrock 4 - Weather (windy, extremes temps, tides)  
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4 main GOALS of an engineer/architect when designing a bridge   1- Strong 2 - Safe 3 - Long lasting 4 - Budget  
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2 MODERN materials that are used for bridges   1 - Prestressed concrete 2 - Steel  
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2 ways a bridge can be HELPFUL to the people in the area   1 - Save gasoline by going shorter distances 2 - burn less gas so less CO2 pollution in the atmosphere  
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2 Ways a bridge might be HARMFUL to the natural area and organisms   1 - Grass and farmland dug up 2 - Destroy natural habitat for plants and animals, so many die or need to relocate to survive  
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Suspension Bridge   A bridge that droops down between the two ends that hold it up.  
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Beam Bridge   A bridge that is flat across the bridge deck and supported at the two ends by the abutments.  
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Arch Bridge   A bridge that reaches across a river in an arching shape rather than straight and flat.  
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2 earliest materials used for ANCIENT bridges   1 - Natural cement 2 - Stones / rocks  
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2 ways bridge construction TODAY is better protecting the environment   1 - Special erosion barriers are put all around the site to keep loose sediments from washing into lakes and rivers 2 - Fewer plants and trees are removed  
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Created by: RoperFive
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