The Great Extinction
| S | C | A | T | A | C | L | Y | S | M | F | B |
| U | B | Y | C | R | A | T | E | R | H | N | O |
| O | A | U | J | I | Y | N | H | S | O | D | A |
| E | S | C | L | Q | M | K | A | I | C | N | E |
| C | T | A | E | U | R | P | T | I | D | A | T |
| A | E | T | M | U | X | C | A | U | I | S | A |
| T | R | A | V | E | N | C | S | C | U | R | M |
| E | O | N | I | I | T | T | I | N | T | H | I |
| R | I | L | T | O | M | E | A | H | P | E | L |
| C | D | X | T | E | N | M | O | Z | C | O | C |
| T | E | H | M | U | I | D | I | R | I | T | W |
| E | R | I | F | D | L | I | W | G | S | X | S |
- ASH
- ASTEROID
- CATACLYSM
- CHICXULUB
- CLIMATE
- CRATER
- CRETACEOUS
- DUST
- EXTINCTION
- IMPACT
- IRIDIUM
- METEOR
- TSUNAMI
- WILDFIRE
- YUCATAN
Sixty-six million years ago a rock the size of a mountain hit the Yucatan and wiped out most life on Earth. This puzzle covers that day and the clues scientists use to reconstruct it, from the Chicxulub crater to the telltale iridium layer. It's good for older kids who want the how and why behind the dinosaurs' end. Find the words online or print it for a lesson.