Across
- 1. an underground railway
- 2. vehicle capable of moving on its own
- 3. a watercraft that stays under water
- 5. under
- 7. study of humans
- 8. story of a person’s life written by that person
- 11. below zero degrees
- 12. study of the past based on artifacts
- 14. study of
Down
- 1. an additional headline/title under the main headline/title
- 4. a person’s own signature
- 6. study of living things
- 7. self, own
- 8. working by itself
- 9. to put under water
- 10. study of the earth
- 12. a device that allows a plane or ship to steer itself
- 13. study of animals