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How many states does Australia have, not counting its territories? Answer with the whole number only.
What is the two-character IATA code of Lufthansa? Answer with the two-character code only.
Whose constant, symbol h, relates a photon's energy to its frequency? Answer with the surname only.
How many planets in the Solar System have ring systems? Answer with the whole number only.
In what year did Henry Cavendish carry out his experiment to measure the density of the Earth? Answer with the four-digit year only.
What is the capital of Morocco? Answer with the city name only.
Marie Curie won Nobel Prizes in both physics and chemistry. Answer true or false.
Which particle carries the electromagnetic force? Answer with the particle name only, in lowercase.
Australia is both a country and a continent. Answer true or false.
In what year did Pierre Agostini, Ferenc Krausz and Anne L'Huillier win the Nobel Prize in Physics for attosecond light pulses? Answer with the four-digit year only.
In what year did the Airbus A380 enter commercial service? Answer with the four-digit year only.
In what year was Ivy Mike, the first full-scale hydrogen bomb test, detonated? Answer with the four-digit year only.
What is the SI unit of magnetic flux? Answer with the unit name only, in lowercase.
What is the capital of Ethiopia? Answer with the city name only.
How many natural moons does Mars have? Answer with the whole number only.
Istanbul is the capital of Turkey. Answer true or false.
In what year did Werner Heisenberg publish the uncertainty principle? Answer with the four-digit year only.
Which planet is closest to the Sun? Answer with the name only.
In what year did Japan Airlines Flight 123 crash, the deadliest single-aircraft accident? Answer with the four-digit year only.
Who was the first American to orbit the Earth? Answer with the surname only.
The equator passes through Brazil. Answer true or false.
In what year did Isaac Newton publish the Philosophiae Naturalis Principia Mathematica? Answer with the four-digit year only.
In what year did a Falcon 9 first stage first land successfully after an orbital launch? Answer with the four-digit year only.
How many pascals are in one standard atmosphere, exactly? Answer with the whole number only.
In what year did the Perseverance rover land on Mars? Answer with the four-digit year only.