Hudsons Earth, sun and moon crossword

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Across
  1. 1. it gives the earth light at night
  2. 6. there are twelve of these in a year
  3. 7. when most of the moon is lit
  4. 9. when half of the moon is lit
  5. 11. the earths pull
  6. 13. its a large ball of gas
  7. 14. an imaginary line from the north pole to the South Pole
  8. 15. when the moon goes in-between the earth and sun
  9. 16. the earth ______ around the sun
  10. 17. when most of the moon is dark
Down
  1. 2. when the moon has no light
  2. 3. when the moon increases in light
  3. 4. the earths tilt causes these
  4. 5. when the earth goes in-between the sun and moon
  5. 8. this causes night and day
  6. 10. when the moon is fully lit
  7. 12. when the moon decreases in light