Across
- 3. sea sickness
- 6. under the surfis of of earth
- 8. hollow rock lined with crystals
- 9. baked earth
- 10. travel around the earth
- 14. sailing, ships, and sailors
- 16. region
- 17. study of the earth
- 18. fleet of ships
Down
- 1. big an-of for ships to go threw
- 2. person trained to go into space
- 4. steer a ship
- 5. science of the earth
- 7. alien
- 10. a soviet trained to go into space
- 11. almost completely surrounded by land
- 12. person who studies the regions of the earth
- 13. person who took part of california gold rush
- 15. a raised flat mound of dirt