Across
- 3. A Soviet who travels into space.
- 5. An area, region, or piece of land.
- 7. A fleet of warships.
- 11. A hollow stone with crystals inside.
- 14. Baked earth, brownish-red pottery.
- 15. Underground
- 16. A raised, flat mound of earth.
- 18. To steer a ship.
- 19. Someone who plans the course of a ship.
- 20. The study of earth's crust and rocks.
Down
- 1. Not from this world.
- 2. To travel around the earth.
- 4. A person who travels into space.
- 6. The science of the earth's regions.
- 8. A person who took part in the Gold Rush.
- 9. Almost or completely surrounded by land.
- 10. Related to sailing.
- 12. A person who studies the regions of the earth.
- 13. A feeling like sea sickness.
- 17. Wide or deep enough for ships to pass through.