Across
- 3. hydrogen/helium
- 5. rock/metal planets
- 7. distinct blue-green color
- 9. water/ammonia/methane
- 10. the farthest planet from the sun
- 11. known as the red planet
Down
- 1. extremely hot and similar to our planet
- 2. only known planet with life
- 4. known for its wide ring system
- 6. the largest planet
- 8. smallest planet