Solar System Crossword

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Across
  1. 3. the first type of crescent in the moon phase cycle
  2. 7. the center of the sun
  3. 8. the force of attraction between two objects
  4. 9. the outermost layer of the sun's atmosphere
  5. 11. huge, reddish loops of gas that link sunspots
  6. 15. the total number of moon phases
  7. 16. the reason why Earth orbits the sun (has to do with gravity)
  8. 18. atoms combine to form heavier atoms which happens in the sun's core
Down
  1. 1. the closest planet to the sun
  2. 2. the reason why the moon orbits Earth (has to do with gravity)
  3. 4. the outer four planets (large, made of gas)
  4. 5. one of five dwarf planets in the solar system
  5. 6. the orbiting of Earth around the sun
  6. 10. the type of eclipse where Earth blocks light from the moon at night
  7. 12. the spinning of earth on its axis
  8. 13. areas of cooler gas on the sun's surface that appear as dark spots
  9. 14. the shape of the 4th and 6th moon phases (2nd word)
  10. 17. the first four planets (small, dense, rocky)
  11. 19. the planet that is covered in liquid water
  12. 20. the type of eclipse where the moon blocks light from Earth during the day