Jeopardy! Round, Double Jeopardy! Round, or Tiebreaker Round clues (9 results returned)

#8391, aired 2021-05-03YE OLDE SCIENCE $2000: 18th century scientists believed all combustible materials contained a substance they called this, from Greek for "burned" phlogiston
#6880, aired 2014-07-1118th CENTURY SCIENTISTS $400: He wrote, "In September 1752, I erected an iron rod to draw the lightning down into my house" Benjamin Franklin
#6880, aired 2014-07-1118th CENTURY SCIENTISTS $800: In 1759 Braun & Lomonosov used snow & acid to freeze this liquid metal mercury
#6880, aired 2014-07-1118th CENTURY SCIENTISTS $1200: This Swedish inventor of a temperature scale helped confirm that the Earth is a spheroid flat at the poles Celsius
#6880, aired 2014-07-1118th CENTURY SCIENTISTS $1600: Scottish chemist Joseph Black identified this 2-word gas, which he called "fixed air" carbon dioxide
#6880, aired 2014-07-1118th CENTURY SCIENTISTS $2000: In 1782 he became George III's court astronomer; his sister Caroline was the first woman to discover a comet William Herschel
#3715, aired 2000-10-27SPACE SCIENTISTS $200: In the 18th century Charles Messier was known as "The Ferret" of these tailed bodies Comets
#2579, aired 1995-11-16SCIENTISTS $1000: Though oxygen was discovered by Joseph Priestley, this 18th century French chemist gave it its name Antoine Lavoisier
#1537, aired 1991-04-16SCIENTISTS $1000: Sweden's Carl Wilhelm Scheele & this 18th century Englishman are both credited with discovering oxygen Joseph Priestley

Final Jeopardy! Round clues (2 results returned)

#7282, aired 2016-04-1918th CENTURY BRITISH SCIENTISTS: In 1705 he wrote, "And, if it should then return, we shall have no reason to doubt but the rest must return too" (Edmond) Halley
#5639, aired 2009-02-2618th CENTURY SCIENTISTS: This N. European said his grave-stone should be inscribed Princeps botanicorum, "prince of botanists" Carolus Linnaeus

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