Across
- 2. Gas we breathe (6)
- 5. Extinct reptile from millions of years ago
- 6. Person of enormous size (5)
- 8. Smallest building block of matter (5)
- 10. Colorful arc after rain (7)
Down
- 1. Ancient Egyptian tomb shape (6)
- 3. Mountain that erupts lava (7)
- 4. City where the government sits (7)
- 7. Musical instrument with keys (5)
- 9. Largest body of saltwater (6)