The Solar System

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Across
  1. 3. these currents occur when hot molecules rise, cool, then sink in a repeating cycle
  2. 6. Planet with the hottest surface due to
  3. 7. Middle layer of the sun's interior
  4. 9. Process where hydrogen atoms join together to form helium
  5. 12. Greatest mass in our solar system, around which planets orbit
  6. 14. thick atmosphere made of carbon dioxide
  7. 15. farthest planet from the sun
  8. 18. Second layer of the sun's atmosphere
  9. 19. First layer of the sun's atmosphere
  10. 21. Average distance from the Earth's center to Sun's center
  11. 22. the red planet
  12. 23. planet with the most spectacular rings
Down
  1. 1. Biggest planet of the solar system
  2. 2. Outer layer of the sun's interior
  3. 4. when gases in the atmosphere trap heat from the sun
  4. 5. Force holding everything together in solar system
  5. 8. Rocky planet with no atmosphere that is closest to the sun
  6. 10. Outer layer of the sun's atmosphere that looks like a crown
  7. 11. Planet with horizontal axis
  8. 13. Hypothesis about the formation of the solar system
  9. 16. Planets that have a rocky surface
  10. 17. Interior layer of the sun with the greatest energy
  11. 20. Planets that have a surface made of gas