Across
- 3. they are made up of mostly rock
- 7. layers of gases surrounding a planet or other celestial body
- 8. it has a thick atmosphere
- 10. earth like object in some ways
Down
- 1. known as the red planet
- 2. a collection of 8 planets
- 4. moves repeatedly around
- 5. it is a celestial object
- 6. has the shortest orbit around the sun
- 9. contains water & oxygen needed for life