| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| The heat index combines current temperature & this, water vapor in the air as a percentage of its saturation point | relative humidity | $1,200 | DJ | EARTH SCIENCE | 2026-03-06 | #9515 | |
| The sling psychrometer & hair hygrometer are used to determine the relative amount of this | humidity | $400 | J | EARTH SCIENCE | 1996-09-30 | #2776 |