Across
- 3. a layer of air that protects planets
- 6. a circular path around the sun
- 8. planets planets that have a surface
- 9. star
- 10. closest planet to the sun
Down
- 1. hottest planet in solar system
- 2. the red planet
- 4. a big rock that orbits a planet
- 5. only planet with life and water
- 7. planets mercury venus earth mars