Materials Science quiz
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Why do airliner windows have rounded corners?
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More questions about Materials Science
These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.
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Which kitchen mix turns hard when you punch it?
Answer: Cornstarch and water
Why: In US Army tests, Kevlar soaked in a fluid that stiffens like this beat plain Kevlar more than three times as thick.
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How much energy does recycling aluminium save over new metal?
Answer: About 95%
Why: In 2019, a tonne of new aluminium took about 186 gigajoules of energy, while a tonne of recycled metal took about 8.
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What failure leaves beach marks on broken metal?
Answer: Fatigue
Why: Beach marks map the slow advance of a microscopic crack front across thousands of repeated stress cycles.
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Which metal makes up most of a tin can?
Answer: Steel
Why: The tin is only a thin coat against rust, and it protects the steel only while that coat stays unbroken.
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What did NASA's Stardust probe catch comet dust in?
Answer: Aerogel
Why: Each grain that struck the aerogel tunnelled a track up to 200 times its own length before coming to rest.
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When does a katana blade gain most of its curve?
Answer: During quenching
Why: Clay on the spine slows its cooling, so the soft back contracts more than the hard edge and bends the blade.
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