Across
- 1. a place where firefighters get water
- 5. a symbol used in text
- 6. a type of rock from outerspace
- 9. gas used to help blimps fly
- 11. to absorb water
- 12. operated by a liquid moving in a confined space
- 15. happening in the air
- 17. spectacular flying
- 19. done under the earth's surface
- 20. aliens
Down
- 2. a bad thing
- 3. a type of dog
- 4. the study of movements
- 6. branch of space flight
- 7. a boat with foil underneath
- 8. a piece of land that is owned by someone
- 10. something that sprays
- 13. when you don't have enough water
- 14. a place for small animals
- 15. a traveler in a hot air balloon
- 16. a type of exercise
- 18. someone who goes to space