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A free proton is heavier than a free neutron. Answer true or false.
What is the most populous country in Africa? Answer with the country name only.
Concorde cruised faster than the speed of sound. Answer true or false.
In what year was the Boeing 737 MAX grounded worldwide after two crashes? Answer with the four-digit year only.
How many seconds are in one day of exactly 24 hours? Answer with the whole number only.
What is the capital of Kazakhstan? Answer with the city name only.
What is the IATA code of Tokyo Narita International Airport? Answer with the three-letter code only.
What is the capital of Peru? Answer with the city name only.
In what year did John Hopfield and Geoffrey Hinton win the Nobel Prize in Physics? Answer with the four-digit year only.
In what year did the Channel Tunnel open? Answer with the four-digit year only.
What is the largest US state by area? Answer with the name only.
Which color of visible light has the longest wavelength? Answer with the color name only, in lowercase.
Buzz Aldrin was the first person to step onto the Moon. Answer true or false.
In what year did Roger Penrose, Reinhard Genzel and Andrea Ghez share the Nobel Prize in Physics? Answer with the four-digit year only.
What is the height of Mount Kilimanjaro in meters, as usually cited? Answer with the whole number only.
Which planet did William Herschel discover in 1781? Answer with the name only.
In what year did Wolfgang Pauli propose the existence of the neutrino? Answer with the four-digit year only.
In what year did Mars Pathfinder land on Mars with the Sojourner rover? Answer with the four-digit year only.
How many Galilean moons of Jupiter are there? Answer with the whole number only.
What is the capital of Venezuela? Answer with the city name only.
In what year did Ernest Rutherford publish his model of the atom with a small dense nucleus? Answer with the four-digit year only.
Pluto is larger than Earth's Moon. Answer true or false.
In what year did Carl Anderson discover the positron? Answer with the four-digit year only.
Which moon of Jupiter is the most volcanically active body in the Solar System? Answer with the name only.
What is the two-character IATA code of Aeroflot? Answer with the two-character code only.