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Showing 9621–9630
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9621
Which material holds the record for being the lightest solid ever created?
A. Aerogel
B. Graphite
C. Styrofoam
D. Carbon fiber
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Explanation
Aerogel is extremely lightweight due to its porous structure.
9622
Which insect holds the record for being the fastest flying insect?
A. Dragonfly
B. Bee
C. Wasp
D. Butterfly
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Explanation
Some dragonflies can reach speeds of up to 60 km/h.
9623
Who holds the record for the fastest 100m sprint?
A. Justin Gatlin
B. Usain Bolt
C. Yohan Blake
D. Asafa Powell
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Explanation
Usain Bolt set the record at 9.58 seconds in 2009.
9624
Which animal holds the record for being the fastest land mammal?
A. Cheetah
B. Pronghorn
C. Lion
D. Greyhound
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Explanation
The cheetah can reach speeds of up to 120 km/h, making it the fastest land mammal.
9625
Which building has the world's fastest elevator?
A. Taipei 101
B. Shanghai Tower
C. Lotte World Tower
D. Burj Khalifa
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Explanation
Its elevators reach speeds of 20.5 m/s.
9626
Which is the shortest strait used for international navigation between Europe and Asia (commonly used short crossing)?
A. Bosphorus
B. Dardanelles
C. Strait of Gibraltar
D. English Channel
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Explanation
The Bosphorus Strait in Istanbul is one of the narrowest straits used for international navigation, connecting the Black Sea to the Sea of Marmara.
9627
Which is the shortest mountain range by length among named ranges listed (commonly short)?
A. Aravalli Range
B. Alaska Range
C. Alborz Range
D. Shawangunk Ridge
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Explanation
The Shawangunk Ridge in New York is a relatively short continuation of the long Appalachian ridge, much shorter than major ranges like the Alaska or Aravalli ranges.
9628
Which is the shortest river in the United Kingdom often cited?
A. River Thames (short section)
B. River Bain (North Yorkshire)
C. River Roe
D. River Ness
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Explanation
The River Bain in North Yorkshire is one of the shortest rivers in the UK, measuring approximately 4 kilometers (2.5 miles) from Semerwater to the River Ure.
9629
Which is the shortest time zone span country-wise (country spanning the least time zones)?
A. China
B. Russia
C. France (metropolitan only)
D. Vatican City
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Explanation
Small countries like Vatican City fall entirely within a single time zone and cover minimal longitudinal distance, giving them the shortest span.
9630
Which is the shortest international border between two sovereign states (example very short recognized border)?
A. Spain–Morocco (Ceuta/Melilla)
B. Vatican City–Italy
C. Monaco–France
D. Austria–Slovenia
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Explanation
The boundary between Vatican City and Italy is approximately 3.2 km (2 miles) long, making it the shortest international border between two sovereign states.
