Across
- 3. is a
- 6. 14 miles away
- 9. concept where humans use science to change the atmosphere and
- 12. and the Phoenix lander tested water ice below the surface in 2008.
- 13. exists at the poles of
- 15. happens once every 26 months.
- 17. in orbits around mars
Down
- 1. Marineris extends the length of Europe and
- 2. have suggested Mars could be terraformed one day.
- 4. makes light and is white
- 5. two activites on the surface
- 7. 7.5 miles away
- 8. the fourth planet from the sun.
- 10. depths of up to four and a half miles (seven km).
- 11. of a planet in order to make it
- 14. like Earth.
- 16. from asteroids are evident on the