Across
- 1. unusual
- 4. a reasonable explanation for why something happens
- 7. a small, rocky, planet-like body that circles the sun
- 10. someone who works in science
- 12. cause surprise
- 14. a long fruit with hard green skin and white flesh
- 16. not able to be explained
- 18. perhaps
- 19. to give reasons for
Down
- 2. someone who studies the universe
- 3. to become bigger or more
- 4. a particular method of solving practical problems
- 5. the way in which one may face or travel
- 6. a vehicle which carries people and things in outer space
- 8. to bump or crash
- 9. possibly
- 11. to examine
- 12. moving fast
- 13. go past
- 15. a long trip from one place to another
- 17. to travel across or through