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Earth's outer core is solid. Answer true or false.
Who developed the first successful rabies vaccine in 1885? Answer with the surname only.
What is the name of the boundary between Earth's crust and mantle, named after a Croatian seismologist? Answer with the one-word short name only.
Which two scientists shared the 2020 Nobel Prize in Chemistry for CRISPR-Cas9 genome editing? Answer with the surname of the one born in France only.
In which ocean is the Mariana Trench? Answer with the name only.
Which element is the most abundant in the universe by mass? Answer with the element name only, in English.
What is the chemical symbol of lead? Answer with the chemical symbol only.
Light travels faster in water than in a vacuum. Answer true or false.
Antarctica is the driest continent. Answer true or false.
How many carbon atoms are in one molecule of benzene? Answer with the whole number only.
How many chambers does the human heart have? Answer with the whole number only.
What is the SI unit of power? Answer with the name only.
What is the fastest land animal? Answer with the common name only, in lowercase.
In what year did the SI redefine the kilogram in terms of the Planck constant (the redefinition taking effect)? Answer with the four-digit year only.
Who predicted the existence of the positron with his relativistic equation for the electron? Answer with the surname only.
In what year did Mount Vesuvius destroy Pompeii? Answer with the year only, as a number. Answer with the whole number only.
What is the chemical symbol of silver? Answer with the chemical symbol only.
What is the SI unit of frequency? Answer with the name only.
Penguins are native to the Arctic. Answer true or false.
Which NASA rover landed on Mars in February 2021? Answer with the name only.
Which organelle is known as the powerhouse of the cell? Answer with the organelle name only, singular, in lowercase.
A proton is heavier than a neutron. Answer true or false.
What is the closest known star to the Sun? Answer with the two-word name only.
In what year was the Montreal Protocol on ozone-depleting substances signed? Answer with the four-digit year only.
What is the ISO 4217 currency code of the Swiss franc? Answer with the three-letter code only.