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Astronomy 101 Chapter 8 Crossword

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