| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| He invented carbonated water as a byproduct of his investigations into the chemistry of air | Joseph Priestley | FJ | SCIENCE | 2000-12-01 | #3740 | ||
| When this scientist discovered oxygen, he called it dephlogisticated air | Joseph Priestley | $1,000 | DJ | SCIENCE | 1990-04-02 | #1296 |