Across
- 3. (a color less, gas)
- 6. (gives off energy to Earth)
- 8. ( gases surrounding the Earth or another planet)
- 10. (collects and drains water)
- 12. (Meridians starts to measure at the number)
- 13. ( planets that lie outside the asteroid belt)
- 14. ( 2nd largest ocean)
- 16. ( a strong focus)
- 17. Giant ( what the Earth will become in 6 billion years)
- 20. vapor (gaseous form of water)
- 22. Ocean ( smallest)
- 23. (adopted as the zero of longitude)
- 25. (coldest place)
- 26. (whole day)
- 28. (largest ocean
Down
- 1. (had a gravitational field)
- 2. (layers of water )
- 4. (a big explosion)
- 5. (North)
- 7. (a layer)
- 9. (production of complex cells)
- 11. (shape of Earth)
- 15. (3rd largest ocean)
- 18. (east or west)
- 19. Way (our own galaxy)
- 21. (the way the Earth moves)
- 24. (a strong force)
- 27. (An imaginary line)