earth and mars
Across
- 5. Ice found at the poles and beneath some of the surface of Mars
- 7. the fifth largest planet in the solar system
- 13. core The _____ is a solid sphere made of iron and nickel metals.
- 14. An extensive canyon system on the Mars equator
- 15. A very large shield volcano mountain on the planet Mars
- 16. earth makes a complete orbit around the sun in about 365
Down
- 1. earth is _______
- 2. the name Earth is a Germanic word, which simply means “____.”
- 3. earth has how many moons.
- 4. these people have suggested Mars could be terraformed one day.
- 6. all of the planets, except for ____, were named after Greek and Roman gods and goddesses
- 8. The name Earth is at least ____ years old
- 9. The larger of Mars’ two moons, orbits closest to the planet.
- 10. earth has no rings
- 11. this is the fourth planet from the sun.
- 12. The smaller of Mars’ two moons, orbits furthest from the planet.