Across
- 2. axis tilted on its side
- 4. the envelope of gases surrounding the Earth or another planet
- 7. the elliptical path of planets
- 8. the largest planet
- 9. planets are mostly made up of gas
- 10. the period of time it takes a planet to go around the sun
- 12. the spinning of a planet on its axis
- 14. closet planet to the sun
- 16. hottest planet
- 17. great dark spot
Down
- 1. 2/3 of the surface covered by water
- 3. another word for a moon orbiting a planet
- 5. "the Red Planet"
- 6. gas planet with visible rings
- 11. planets are also called terrestrial planets
- 13. a natural force of attraction exerted by one object on another object
- 15. bowl-shaped cavity on the surface of the planet