| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| The name of the Cretaceous period comes from a Latin word for this substance used to write on a blackboard | chalk | $400 | DJ | SCIENCE | 2014-06-25 | #6868 | |
| This sedimentary rock, "Creta" in Latin, was formed from marine life during the Cretaceous period | Chalk | $600 | DJ | SCIENCE | 1990-02-01 | #1254 | |
| This soft, white form of limestone is formed from the remains of small marine creatures | chalk | $300 | J | SCIENCE | 1988-12-19 | #991 |