As each writer works individually in creating questions, there are unlimited sources. Gary Johnson supervises the subsequent steps of choosing from among the submissions, re-writing where necessary, grouping the questions, determining point values based on difficulty, and the all important work of the researchers who must back up each answer with at least two confirming authorities, and determining what other potential answers will be considered as acceptable.
Ex:
It is the female reproductive part of a flower
Pistil (also: pistilline, pistillate, pistilloid)
Married to Anastasia, this Russian ruler was the first to assume the title of Czar
Ivan the Terrible (also: Ivan Grozny, Ivan IV, Ivan Vasilyevich)
Now for the oldtimers, read along:
"The new major Enyclopedia International from Grollier Incorporated is the source authority for the preparation of questions and answers used on Jeopardy" ;-)
Randy
tvrandywest.com