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Others Like “Fallen Arches: The Surprising Strength of Eggshells”

Project Idea
thumbnail Build model bridges and then deliberately destroy them? Who'd be crazy enough to try that? Read more
CE_p011
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- Less Details
Time Required Average (6-10 days)
Prerequisites None
Material Availability Most items can be obtained locally but may require visiting multiple stores.
Cost Average ($50 - $100)
Safety No issues
Project Idea
thumbnail A bridge collapse, like that of the I-35W Mississippi River Bridge shown below, can be a major disaster. Bridges that cannot hold enough weight to do their intended job can be a serious public safety issue. And if they collapse, they can also cause economic damage due to costly rebuilding and people and companies scrambling to figure out how to circumvent the months of traffic impacts. #* IMG 1 *# Figure 1. On August 1, 2007 the I-35W Mississippi River Bridge collapsed killing 13… Read more
CE_p024
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- Less Details
Time Required Average (6-10 days)
Prerequisites None
Material Availability A kit for this project is available from [# Link Name="CE_p011.6" Value="HtmlAnchor" HtmlText="AquaPhoenix Education" #].
Cost Average ($50 - $100)
Safety No issues
Project Idea
Ever try to tear a telephone book in half? Even though you can easily rip one or a few pages to shreds, the entire phone book has strength in numbers and holds together. This project is an introduction to measuring and comparing the strength of materials. Does spaghetti get extra strength if you bundle it together, or does strength simply increase proportionally with the number of strands? If you're interested in materials testing, get cracking! Read more
MatlSci_p010
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety No issues
Project Idea
thumbnail Have you ever wondered how a chick breathes inside its shell? Every animal needs oxygen to survive, so the chick must get air somehow! Try this science project to discover the answer. Read more
Zoo_p046
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety Thoroughly clean any surface the raw eggs touched because they can carry Salmonella.
Project Idea
thumbnail Have you ever dyed eggs? Turning eggshells from white into different, dazzling colors can be a lot of fun! To do this, most people buy dye tablets to make different colors in a liquid bath. They then dip the egg into the liquid and wait till it turns the desired color. You can dye eggs in many other ways, and one neat method uses silk ties. Sounds strange to use clothing to dye eggs, right? But it actually works really well! In this science project, you will dye eggs with old or used… Read more
Chem_p103
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- Less Details
Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety Adult supervision is recommended when using scissors and required for using the stove. A well-ventilated stove area, or dust masks, are needed to avoid breathing in vinegar and dye fumes. Do not eat the eggs after dyeing them.
Project Idea
thumbnail This is an interesting project that explores which geometrical shapes make the strongest bridge truss structures. It is a good introduction to the engineering design process. You'll design three different trusses, and use online simulation software to analyze the distribution of load-bearing forces in each design. Then you'll build and test prototypes of each design. Read more
CE_p006
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- Less Details
Time Required Average (6-10 days)
Prerequisites Excellent computer skills, high school physics course
Material Availability Readily available
Cost Low ($20 - $50)
Safety Use caution with sharp tools when cutting wooden parts to size. Adult supervision recommended for bridge-testing phase.
Project Idea
Is an I-beam as strong as a solid beam of the same size? What if you include weight in the comparison: which beam has the greater strength-to-weight ratio? Would an I-beam be stronger than a solid rectangular beam of the same weight? What about other structural shapes (e.g., T-beams, U-beams)? In this project you can find out by setting up a test stand, putting on your safety goggles and measuring how much stress these building components can handle before they snap. Read more
MatlSci_p011
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- Less Details
Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety Minor injury possible: Wear safety glasses when testing beam capacity. Keep hands and feet clear of the area underneath the weight bucket, which may fall at any time.
Project Idea
thumbnail Bridges are big and beautiful structures, but they also need to be safe for the people who cross over them every day. Building a bridge that is safe and secure is a challenge to civil engineers. But the job is even more challenging if you live in earthquake country! Find out how engineers are solving this problem as they build a new bridge over the San Francisco Bay in California. Try some of your own Bay Bridge designs. Will your bridge design take the shake of a quake? Read more
CE_p012
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- Less Details
Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Project Idea
thumbnail Suspension bridges, with their tall towers, long spans, and gracefully curving cables, are beautiful examples of the work of civil engineers. How do the cables and towers carry the load that is on the bridge? Can a suspension bridge carry a greater load than a simple beam bridge? This science project shows you how to find out. Read more
CE_p007
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- Less Details
Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Project Idea
thumbnail Sometimes on a busy day, it is hard to get things done. The rush to get things done can start first thing in the morning, when you are so busy getting ready and gathering your homework, that you barely have time for breakfast. It takes time to get a nutritious meal ready. But, eggs are a perfect choice for breakfast because they can be cooked quickly and in many different ways. A soft-boiled egg is a choice that many people make. They like the way the thickened, tasty yolk coats their hash… Read more
FoodSci_p046
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- Less Details
Time Required Short (2-5 days)
Prerequisites Access to a stove top
Material Availability Readily available
Cost Very Low (under $20)
Safety Adult supervision is required. Exercise caution when working with a stove top. There is a chance that eggs can carry a bacteria called Salmonella. Salmonella can cause severe food poisoning. The Centers for Disease Control and Prevention ([# Link Name="FoodSci_p046.1" Value="HtmlAnchor" #]) recommend avoiding eating eggs unless the whites and yolks are both firmly cooked. For this reason, we do not recommend eating the soft-boiled eggs in this science project; just make observations. If you would like to eat them, consider doing your science project with pasteurized eggs.
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