Across
- 1. something you don’t want everybody to know
- 6. to become a member of a group or activity
- 7. arrive
- 9. the very first
- 12. researcher
- 13. biologist
- 15. a very large animal that used to live millions of years ago
- 16. of a high standard
- 18. attractive
- 19. the study of substances and chemicals
- 20. discover
Down
- 2. aurora
- 3. to fill a bag with stuff needed for travel
- 4. sick person
- 5. discovery
- 8. the remains of ancient life preserved in rock
- 10. preserve
- 11. ruin
- 14. the outer layer of a fish or reptile’s skin
- 17. reach