Across
- 5. volcanic eruptions releasing gas to form the atmosphere
- 6. primary bodies that revolve around the sun
- 8. Earth centered model
- 9. formation of the core, mantel, and crust
- 11. planets with a gas surface
- 13. time required for a body to complete a single orbit
- 14. rotating cloud of gas and dust where the sun and planets formed
- 15. planetesimals join together through collision and gravity
Down
- 1. small bodies from which a planet originates
- 2. a molecule containing 3 oxygens atoms
- 3. region beyond Neptune's orbi
- 4. sun centered model
- 7. planets made of rock
- 10. seperates the terrestrial and gas planets
- 12. consists of the sun, planets, dwarf planets, and other objects revolving around the sun