Across
- 2. Asteroids look like this vegetable
- 6. Hydrogen compound you can drink!
- 9. A hydrogen compound abundant on Uranus and Neptune
- 10. Home to the outer comets
- 11. Theory of how our solar system formed
- 13. This planet captured both of its moons
- 16. Method we use to date rocks
- 17. Hydrogen compound you do not drink
- 18. Inner comet belt
- 19. This could exist in the hot inner solar system, during formation
- 20. Time for 1/2 of a parent nuclei to decay
Down
- 1. Stream of charged particles from the Sun
- 3. This increased when the solar nebula collapsed
- 4. How small seeds of matter grew into planets
- 5. Cloud of gas and dust from which the solar system formed
- 7. Conservation of ___________ means that the early solar system spun faster as it collapsed
- 8. Early period in history of solar system that was very volatile
- 12. Planet piece
- 14. These cause the solar nebula to flatten
- 15. Our Moon is was created in a ______________