Across
- 2. Planet with no moons.
- 4. Planet that has living things on it.
- 6. Planet with a red surface (the "red planet").
- 8. The inner planets have a _______ surface.
- 9. Venus is the _______ planet.
Down
- 1. Closest planet to the sun.
- 3. Mercury is the _______ planet.
- 5. Mars is the _______ planet from the sun.
- 7. Planets, The four planets closest to the Sun.
