Across
- 1. known as the red planet, because of iron oxide
- 3. Know as a "dirty snowball"
- 6. Largest planet in the solar system
- 9. force that governs the motion of objects in Earth's solar system
- 10. Orbits a planet
- 12. Inner planets are known as
- 14. last planet in our solar system
- 16. Located in a band between Mars and Jupiter
- 19. zone that allows life to exist
Down
- 2. Known for its beautiful rings
- 4. Burning object located in Earth's atmosphere
- 5. allows life to exist
- 7. the revolution length of mercury compared to neptune
- 8. to spin on an axis
- 9. outer planets are made of this
- 11. physical state of water needed for life to exist
- 13. to move around an object
- 15. happens to temperature when a planet is further away from the sun
- 17. composed of hydrogen and helium
- 18. an inner planet, known as being "blue"