Across
- 2. One of the two requirements for life (not energy source)
- 5. Planet closest to the sun
- 7. Proposed answer to a question about the natural world
- 10. Planet with large, visible rings
- 11. All the water and ice on a planet
- 12. Planet that we live on
- 13. Planets with a solid surface
- 15. Red planet with multiple rovers exploring it
- 16. Solid part of a planet
- 18. Having the conditions necessary for life
- 19. The energy source for Earth
Down
- 1. Scientist that studies everything about Earth
- 3. Last planet in the solar system
- 4. Living things on a planet
- 6. A path carved out by a liquid on the surface of a planet
- 8. Largest Planet
- 9. Molten Rock
- 14. Gases that surround a planet
- 17. Large, outer planets made of gas and ice