| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Einstein said measurements of this depend on whether the observer is moving; it's not absolute | time | $500 | J | SCIENCE | 1997-07-18 | #2985 | |
| Plasma has been called the fourth state of matter & in relativity theory this is the fourth dimension | time | $300 | J | GENERAL SCIENCE | 1996-02-16 | #2645 | |
| It's what a chronometer measures | time | $200 | DJ | SCIENCE TRIVIA | 1986-09-23 | #467 | |
| After length, width & depth, the 4th dimension | time | $300 | J | SCIENCE | 1984-12-10 | #66 |