Across
- 5. adapting and changing
- 7. secound longest division of time
- 8. dogs
- 10. best adapted
- 12. thrid longest division of time
- 14. 263 million years
- 15. shortest division of time
Down
- 1. extinct marine arthropods
- 2. landmasses of the Earth
- 3. seaweed
- 4. chart of time
- 6. before cambrian time
- 9. 544 million years
- 11. 63 million years
- 13. longest division of time